diff --git a/.travis.yml b/.travis.yml
index ddc5cb6948..1d6651c164 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,7 +20,7 @@ matrix:
     jdk: oraclejdk8
 
 script:
-  - curl -L -o ~/bin/mill https://github.com/lihaoyi/mill/releases/download/0.2.6/0.2.6-19-807e47 && chmod +x ~/bin/mill
+  - curl -L -o ~/bin/mill https://github.com/lihaoyi/mill/releases/download/0.4.1/0.4.1-4-158d11 && chmod +x ~/bin/mill
   - export PATH=~/bin/mill:$PATH
   - "$CI_SCRIPT"
 
diff --git a/build.sc b/build.sc
index 99e12618b0..b7f3ed1183 100644
--- a/build.sc
+++ b/build.sc
@@ -17,21 +17,21 @@ import $file.example.scalatags.build
 import $file.example.staticFiles.build
 import $file.example.todo.build
 import $file.example.todoApi.build
-import $file.example.todoDb.build
+//import $file.example.todoDb.build
 import $file.example.twirl.build
 import $file.example.variableRoutes.build
 import $file.example.websockets.build
 
 object cask extends ScalaModule with PublishModule {
-  def scalaVersion = "2.12.6"
+  def scalaVersion = "2.13.0"
   def ivyDeps = Agg(
     ivy"org.scala-lang:scala-reflect:${scalaVersion()}",
     ivy"io.undertow:undertow-core:2.0.13.Final",
-    ivy"com.lihaoyi::upickle:0.7.1",
+    ivy"com.lihaoyi::upickle:0.7.5",
   )
-  def compileIvyDeps = Agg(ivy"com.lihaoyi::acyclic:0.1.7")
+  def compileIvyDeps = Agg(ivy"com.lihaoyi::acyclic:0.2.0")
   def scalacOptions = Seq("-P:acyclic:force")
-  def scalacPluginIvyDeps = Agg(ivy"com.lihaoyi::acyclic:0.1.7")
+  def scalacPluginIvyDeps = Agg(ivy"com.lihaoyi::acyclic:0.2.0")
 
   def publishVersion = build.publishVersion()._2
 
@@ -50,10 +50,10 @@ object cask extends ScalaModule with PublishModule {
 
     def testFrameworks = Seq("utest.runner.Framework")
     def ivyDeps = Agg(
-      ivy"com.lihaoyi::utest::0.6.6",
-      ivy"com.lihaoyi::requests::0.1.5",
-      ivy"org.xerial:sqlite-jdbc:3.18.0",
-      ivy"io.getquill::quill-jdbc:2.6.0"
+      ivy"com.lihaoyi::utest::0.6.9",
+      ivy"com.lihaoyi::requests::0.2.0",
+//      ivy"org.xerial:sqlite-jdbc:3.18.0",
+//      ivy"io.getquill::quill-jdbc:2.6.0"
     )
   }
 }
@@ -78,9 +78,9 @@ object example extends Module{
   object redirectAbort extends $file.example.redirectAbort.build.AppModule with LocalModule
   object scalatags extends $file.example.scalatags.build.AppModule with LocalModule
   object staticFiles extends $file.example.staticFiles.build.AppModule with LocalModule
-  object todo extends $file.example.todo.build.AppModule with LocalModule
+//  object todo extends $file.example.todo.build.AppModule with LocalModule
   object todoApi extends $file.example.todoApi.build.AppModule with LocalModule
-  object todoDb extends $file.example.todoDb.build.AppModule with LocalModule
+//  object todoDb extends $file.example.todoDb.build.AppModule with LocalModule
   object twirl extends $file.example.twirl.build.AppModule with LocalModule
   object variableRoutes extends $file.example.variableRoutes.build.AppModule with LocalModule
   object websockets extends $file.example.websockets.build.AppModule with LocalModule
@@ -93,17 +93,16 @@ def uploadToGithub(authKey: String) = T.command{
   val (releaseTag, label) = publishVersion()
 
   if (releaseTag == label){
-    scalaj.http.Http("https://api.github.com/repos/lihaoyi/cask/releases")
-      .postData(
-        ujson.write(
-          Js.Obj(
-            "tag_name" -> releaseTag,
-            "name" -> releaseTag
-          )
+    requests.post(
+      "https://api.github.com/repos/lihaoyi/cask/releases",
+      data = ujson.write(
+        Js.Obj(
+          "tag_name" -> releaseTag,
+          "name" -> releaseTag
         )
-      )
-      .header("Authorization", "token " + authKey)
-      .asString
+      ),
+      headers = Seq("Authorization" -> s"token $authKey")
+    )
   }
 
   val examples = Seq(
@@ -121,9 +120,9 @@ def uploadToGithub(authKey: String) = T.command{
     $file.example.redirectAbort.build.millSourcePath,
     $file.example.scalatags.build.millSourcePath,
     $file.example.staticFiles.build.millSourcePath,
-    $file.example.todo.build.millSourcePath,
+//    $file.example.todo.build.millSourcePath,
     $file.example.todoApi.build.millSourcePath,
-    $file.example.todoDb.build.millSourcePath,
+//    $file.example.todoDb.build.millSourcePath,
     $file.example.twirl.build.millSourcePath,
     $file.example.variableRoutes.build.millSourcePath,
     $file.example.websockets.build.millSourcePath,
@@ -139,7 +138,7 @@ def uploadToGithub(authKey: String) = T.command{
         |if [ ! -f out/mill-cask ]; then
         |  echo "Initializing Cask/Mill build tool for the first time"
         |  mkdir -p out &&
-        |  (echo "#!/usr/bin/env sh" && curl -L https://github.com/lihaoyi/mill/releases/download/0.2.6/0.2.6-27-613878) > out/mill-cask
+        |  (echo "#!/usr/bin/env sh" && curl -L https://github.com/lihaoyi/mill/releases/download/0.4.1/0.4.1-4-158d11) > out/mill-cask
         |fi
         |
         |chmod +x out/mill-cask
diff --git a/cask/src/cask/internal/DispatchTrie.scala b/cask/src/cask/internal/DispatchTrie.scala
index 952c39bdfe..9f1a9c3394 100644
--- a/cask/src/cask/internal/DispatchTrie.scala
+++ b/cask/src/cask/internal/DispatchTrie.scala
@@ -2,10 +2,10 @@ package cask.internal
 import collection.mutable
 object DispatchTrie{
   def construct[T](index: Int,
-                   inputs: Seq[(IndexedSeq[String], T, Boolean)]): DispatchTrie[T] = {
-    val continuations = mutable.Map.empty[String, mutable.Buffer[(IndexedSeq[String], T, Boolean)]]
+                   inputs: collection.Seq[(collection.IndexedSeq[String], T, Boolean)]): DispatchTrie[T] = {
+    val continuations = mutable.Map.empty[String, mutable.Buffer[(collection.IndexedSeq[String], T, Boolean)]]
 
-    val terminals = mutable.Buffer.empty[(IndexedSeq[String], T, Boolean)]
+    val terminals = mutable.Buffer.empty[(collection.IndexedSeq[String], T, Boolean)]
 
     for((path, endPoint, allowSubpath) <- inputs) {
       if (path.length < index) () // do nothing
diff --git a/cask/src/cask/internal/Router.scala b/cask/src/cask/internal/Router.scala
index 64af4cda78..4b1181112d 100644
--- a/cask/src/cask/internal/Router.scala
+++ b/cask/src/cask/internal/Router.scala
@@ -65,7 +65,7 @@ object Router{
         }
       }
 
-      if (missing.nonEmpty || unknown.nonEmpty) Result.Error.MismatchedArguments(missing, unknown.toSeq)
+      if (missing.nonEmpty || unknown.nonEmpty) Result.Error.MismatchedArguments(missing.toSeq, unknown.toSeq)
       else {
         try invoke0(
           target,
diff --git a/cask/src/cask/internal/Util.scala b/cask/src/cask/internal/Util.scala
index 431944a2f4..3f7ab61c4a 100644
--- a/cask/src/cask/internal/Util.scala
+++ b/cask/src/cask/internal/Util.scala
@@ -61,7 +61,7 @@ object Util {
     *
     * Written imperatively for performance since it's used all over the place.
     */
-  def splitPath(p: String): IndexedSeq[String] = {
+  def splitPath(p: String): collection.IndexedSeq[String] = {
     val pLength = p.length
     var i = 0
     while(i < pLength && p(i) == '/') i += 1
@@ -92,7 +92,7 @@ object Util {
     trace.toString
   }
   def softWrap(s: String, leftOffset: Int, maxWidth: Int) = {
-    val oneLine = s.lines.mkString(" ").split(' ')
+    val oneLine = s.linesIterator.mkString(" ").split(' ')
 
     lazy val indent = " " * leftOffset
 
diff --git a/cask/src/cask/main/ErrorMsgs.scala b/cask/src/cask/main/ErrorMsgs.scala
index 0d6f8c66a9..254f4e0ef0 100644
--- a/cask/src/cask/main/ErrorMsgs.scala
+++ b/cask/src/cask/main/ErrorMsgs.scala
@@ -44,7 +44,7 @@ object ErrorMsgs {
       for((lhs, rhs) <- args)
         yield {
           val lhsPadded = lhs.padTo(leftColWidth, ' ')
-          val rhsPadded = rhs.lines.mkString("\n")
+          val rhsPadded = rhs.linesIterator.mkString("\n")
           s"$leftIndentStr  $lhsPadded  $rhsPadded"
         }
     val mainDocSuffix = main.doc match{
diff --git a/cask/src/cask/main/Main.scala b/cask/src/cask/main/Main.scala
index e12683fbce..88d7a61932 100644
--- a/cask/src/cask/main/Main.scala
+++ b/cask/src/cask/main/Main.scala
@@ -44,7 +44,7 @@ abstract class BaseMain{
     .map { method =>
       method -> DispatchTrie.construct[(Routes, Routes.EndpointMetadata[_])](0,
         for ((route, metadata) <- routeList if metadata.endpoint.methods.contains(method))
-        yield (Util.splitPath(metadata.endpoint.path): IndexedSeq[String], (route, metadata), metadata.endpoint.subpath)
+        yield (Util.splitPath(metadata.endpoint.path): collection.IndexedSeq[String], (route, metadata), metadata.endpoint.subpath)
       )
     }.toMap
 
diff --git a/cask/src/cask/main/Routes.scala b/cask/src/cask/main/Routes.scala
index 1a74b87df1..a4660a9935 100644
--- a/cask/src/cask/main/Routes.scala
+++ b/cask/src/cask/main/Routes.scala
@@ -12,7 +12,7 @@ object Routes{
                                  entryPoint: EntryPoint[T, _])
   case class RoutesEndpointsMetadata[T](value: EndpointMetadata[T]*)
   object RoutesEndpointsMetadata{
-    implicit def initialize[T] = macro initializeImpl[T]
+    implicit def initialize[T]: RoutesEndpointsMetadata[T] = macro initializeImpl[T]
     implicit def initializeImpl[T: c.WeakTypeTag](c: Context): c.Expr[RoutesEndpointsMetadata[T]] = {
       import c.universe._
       val router = new cask.internal.Router[c.type](c)
diff --git a/cask/src/cask/model/Params.scala b/cask/src/cask/model/Params.scala
index 270c190352..cb0730bc4e 100644
--- a/cask/src/cask/model/Params.scala
+++ b/cask/src/cask/model/Params.scala
@@ -17,10 +17,10 @@ case class Request(exchange: HttpServerExchange, remainingPathSegments: Seq[Stri
     Util.transferTo(data, baos)
     baos.toByteArray
   }
-  lazy val queryParams: Map[String, Seq[String]] = {
+  lazy val queryParams: Map[String, collection.Seq[String]] = {
     exchange.getQueryParameters.asScala.mapValues(_.asScala.toArray.toSeq).toMap
   }
-  lazy val headers: Map[String, Seq[String]] = {
+  lazy val headers: Map[String, collection.Seq[String]] = {
     exchange.getRequestHeaders.asScala
       .map{ header => header.getHeaderName.toString.toLowerCase -> header.asScala }
       .toMap
diff --git a/ci/upload.sc b/ci/upload.sc
index 6c47295f95..783f76802c 100644
--- a/ci/upload.sc
+++ b/ci/upload.sc
@@ -1,15 +1,14 @@
 #!/usr/bin/env amm
 import ammonite.ops._
-import scalaj.http._
 
 @main
 def shorten(longUrl: String) = {
   println("shorten longUrl " + longUrl)
-  val shortUrl = Http("https://git.io")
-    .postForm(Seq("url" -> longUrl))
-    .asString
-    .headers("Location")
-    .head
+  val shortUrl = requests.post(
+    "https://git.io",
+    data = Seq("url" -> longUrl),
+  ).headers("location").head
+
   println("shorten shortUrl " + shortUrl)
   shortUrl
 }
@@ -18,9 +17,10 @@ def apply(uploadedFile: Path,
           tagName: String,
           uploadName: String,
           authKey: String): String = {
-  val body = Http("https://api.github.com/repos/lihaoyi/cask/releases/tags/" + tagName)
-    .header("Authorization", "token " + authKey)
-    .asString.body
+  val body = requests.get(
+    s"https://api.github.com/repos/lihaoyi/cask/releases/tags/$tagName",
+    headers = Seq("Authorization" -> s"token $authKey")
+  ).text
 
   val parsed = ujson.read(body)
 
@@ -33,15 +33,19 @@ def apply(uploadedFile: Path,
     s"https://uploads.github.com/repos/lihaoyi/cask/releases/" +
       s"$snapshotReleaseId/assets?name=$uploadName"
 
-  val res = Http(uploadUrl)
-    .header("Content-Type", "application/octet-stream")
-    .header("Authorization", "token " + authKey)
-    .timeout(connTimeoutMs = 5000, readTimeoutMs = 60000)
-    .postData(read.bytes! uploadedFile)
-    .asString
+  val res = requests.post(
+    uploadUrl,
+    data = read.bytes! uploadedFile,
+    headers = Seq(
+      "Content-Type" -> "application/octet-stream",
+      "Authorization" -> s"token $authKey"
+    ),
+    connectTimeout = 5000, readTimeout = 60000
+  )
+
 
-  println(res.body)
-  val longUrl = ujson.read(res.body)("browser_download_url").str.toString
+  println(res.text)
+  val longUrl = ujson.read(res.text)("browser_download_url").str.toString
 
   println("Long Url " + longUrl)
 
diff --git a/docs/pages/1 - Cask: a Scala HTTP micro-framework.md b/docs/pages/1 - Cask: a Scala HTTP micro-framework.md
index 4b261a3333..e7e72b5cf1 100644
--- a/docs/pages/1 - Cask: a Scala HTTP micro-framework.md	
+++ b/docs/pages/1 - Cask: a Scala HTTP micro-framework.md	
@@ -162,7 +162,7 @@ what to do in each case. You can use the `@cask.route` annotation to do so
 $$$formJsonPost
 
 If you need to handle a JSON-encoded POST request, you can use the
-`@cast.postJson` decorator. This assumes the posted request body is a JSON dict,
+`@cask.postJson` decorator. This assumes the posted request body is a JSON dict,
 and uses its keys to populate the endpoint's parameters, either as raw
 `ujson.Js.Value`s or deserialized into `Seq[Int]`s or other things.
 Deserialization is handled using the
@@ -217,7 +217,7 @@ the relevant headers or status code for you.
 Cask doesn't come bundled with HTML templating functionality, but it makes it
 really easy to use community-standard libraries like
 [Scalatags](https://github.com/lihaoyi/scalatags) to render your HTML. Simply
-adding the relevant `ivy"com.lihaoyi::scalatags:0.6.7"` dependency to your
+adding the relevant `ivy"com.lihaoyi::scalatags:0.7.0"` dependency to your
 `build.sc` file is enough to render Scalatags templates:
 
 $$$scalatags
@@ -347,7 +347,7 @@ $$$compress3
 $$$websockets
 
 Cask's Websocket endpoints are very similar to Cask's HTTP endpoints. Annotated
-with `@cask.websocket` instead of `@cask.get` or `@cast.post`, the primary
+with `@cask.websocket` instead of `@cask.get` or `@cask.post`, the primary
 difference is that instead of only returning a `cask.Response`, you now have an
 option of returning a `io.undertow.websockets.WebSocketConnectionCallback`.
 
@@ -382,41 +382,61 @@ etc.. Those can be managed via the normal mechanism for
 [Serving Static Files](#serving-static-files).
 
 
-## TodoMVC Database Integration
-
-$$$todoDb
-
-This example demonstrates how to use Cask to write a TodoMVC API server that
-persists it's state in a database rather than in memory. We use the
-[Quill](http://getquill.io/) database access library to write a `@transactional`
-decorator that automatically opens one transaction per call to an endpoint,
-ensuring that database queries are properly committed on success or rolled-back
-on error. Note that because the default database connector propagates its
-transaction context in a thread-local, `@transactional` does not need to pass
-the `ctx` object into each endpoint as an additional parameter list, and so we
-simply leave it out.
-
-While this example is specific to Quill, you can easily modify the
-`@transactional` decorator to make it work with whatever database access library
-you happen to be using. For libraries which need an implicit transaction, it can
-be passed into each endpoint function as an additional parameter list as
-described in
-[Extending Endpoints with Decorators](#extending-endpoints-with-decorators).
-
-## TodoMVC Full Stack Web
-
-
-The following code snippet is the complete code for a full-stack TodoMVC
-implementation: including HTML generation for the web UI via
-[Scalatags](https://github.com/lihaoyi/scalatags), Javascript for the
-interactivity, static file serving, and database integration via
-[Quill](https://github.com/getquill/quill). While slightly long, this example
-should give you a tour of all the things you need to know to use Cask.
-
-Note that this is a "boring" server-side-rendered webapp with Ajax interactions,
-without any complex front-end frameworks or libraries: it's purpose is to
-demonstrate a simple working web application of using Cask end-to-end, which you
-can build upon to create your own Cask web application architected however you
-would like.
-
-$$$todo
+<!--## TodoMVC Database Integration-->
+
+<!--$$$todoDb-->
+
+<!--This example demonstrates how to use Cask to write a TodoMVC API server that-->
+<!--persists it's state in a database rather than in memory. We use the-->
+<!--[Quill](http://getquill.io/) database access library to write a `@transactional`-->
+<!--decorator that automatically opens one transaction per call to an endpoint,-->
+<!--ensuring that database queries are properly committed on success or rolled-back-->
+<!--on error. Note that because the default database connector propagates its-->
+<!--transaction context in a thread-local, `@transactional` does not need to pass-->
+<!--the `ctx` object into each endpoint as an additional parameter list, and so we-->
+<!--simply leave it out.-->
+
+<!--While this example is specific to Quill, you can easily modify the-->
+<!--`@transactional` decorator to make it <!--## TodoMVC Database Integration-->
+
+<!--$$$todoDb-->
+
+<!--This example demonstrates how to use Cask to write a TodoMVC API server that-->
+<!--persists it's state in a database rather than in memory. We use the-->
+<!--[Quill](http://getquill.io/) database access library to write a `@transactional`-->
+<!--decorator that automatically opens one transaction per call to an endpoint,-->
+<!--ensuring that database queries are properly committed on success or rolled-back-->
+<!--on error. Note that because the default database connector propagates its-->
+<!--transaction context in a thread-local, `@transactional` does not need to pass-->
+<!--the `ctx` object into each endpoint as an additional parameter list, and so we-->
+<!--simply leave it out.-->
+
+<!--While this example is specific to Quill, you can easily modify the-->
+<!--`@transactional` decorator to make it work with whatever database access library-->
+<!--you happen to be using. For libraries which need an implicit transaction, it can-->
+<!--be passed into each endpoint function as an additional parameter list as-->
+<!--described in-->
+<!--[Extending Endpoints with Decorators](#extending-endpoints-with-decorators).-->
+<!--work with whatever database access library-->
+<!--you happen to be using. For libraries which need an implicit transaction, it can-->
+<!--be passed into each endpoint function as an additional parameter list as-->
+<!--described in-->
+<!--[Extending Endpoints with Decorators](#extending-endpoints-with-decorators).-->
+
+<!--## TodoMVC Full Stack Web-->
+
+
+<!--The following code snippet is the complete code for a full-stack TodoMVC-->
+<!--implementation: including HTML generation for the web UI via-->
+<!--[Scalatags](https://github.com/lihaoyi/scalatags), Javascript for the-->
+<!--interactivity, static file serving, and database integration via-->
+<!--[Quill](https://github.com/getquill/quill). While slightly long, this example-->
+<!--should give you a tour of all the things you need to know to use Cask.-->
+
+<!--Note that this is a "boring" server-side-rendered webapp with Ajax interactions,-->
+<!--without any complex front-end frameworks or libraries: it's purpose is to-->
+<!--demonstrate a simple working web application of using Cask end-to-end, which you-->
+<!--can build upon to create your own Cask web application architected however you-->
+<!--would like.-->
+
+<!--$$$todo-->
diff --git a/example/compress/build.sc b/example/compress/build.sc
index 2816643a4a..699b94f947 100644
--- a/example/compress/build.sc
+++ b/example/compress/build.sc
@@ -2,7 +2,7 @@ import mill._, scalalib._
 
 
 trait AppModule extends ScalaModule{
-  def scalaVersion = "2.12.6"
+  def scalaVersion = "2.13.0"
   def ivyDeps = Agg(
     ivy"com.lihaoyi::cask:0.1.9",
   )
@@ -11,8 +11,8 @@ trait AppModule extends ScalaModule{
     def testFrameworks = Seq("utest.runner.Framework")
 
     def ivyDeps = Agg(
-      ivy"com.lihaoyi::utest::0.6.3",
-      ivy"com.lihaoyi::requests::0.1.5",
+      ivy"com.lihaoyi::utest::0.6.9",
+      ivy"com.lihaoyi::requests::0.2.0",
     )
   }
 }
\ No newline at end of file
diff --git a/example/compress2/build.sc b/example/compress2/build.sc
index 2816643a4a..699b94f947 100644
--- a/example/compress2/build.sc
+++ b/example/compress2/build.sc
@@ -2,7 +2,7 @@ import mill._, scalalib._
 
 
 trait AppModule extends ScalaModule{
-  def scalaVersion = "2.12.6"
+  def scalaVersion = "2.13.0"
   def ivyDeps = Agg(
     ivy"com.lihaoyi::cask:0.1.9",
   )
@@ -11,8 +11,8 @@ trait AppModule extends ScalaModule{
     def testFrameworks = Seq("utest.runner.Framework")
 
     def ivyDeps = Agg(
-      ivy"com.lihaoyi::utest::0.6.3",
-      ivy"com.lihaoyi::requests::0.1.5",
+      ivy"com.lihaoyi::utest::0.6.9",
+      ivy"com.lihaoyi::requests::0.2.0",
     )
   }
 }
\ No newline at end of file
diff --git a/example/compress3/build.sc b/example/compress3/build.sc
index 2816643a4a..699b94f947 100644
--- a/example/compress3/build.sc
+++ b/example/compress3/build.sc
@@ -2,7 +2,7 @@ import mill._, scalalib._
 
 
 trait AppModule extends ScalaModule{
-  def scalaVersion = "2.12.6"
+  def scalaVersion = "2.13.0"
   def ivyDeps = Agg(
     ivy"com.lihaoyi::cask:0.1.9",
   )
@@ -11,8 +11,8 @@ trait AppModule extends ScalaModule{
     def testFrameworks = Seq("utest.runner.Framework")
 
     def ivyDeps = Agg(
-      ivy"com.lihaoyi::utest::0.6.3",
-      ivy"com.lihaoyi::requests::0.1.5",
+      ivy"com.lihaoyi::utest::0.6.9",
+      ivy"com.lihaoyi::requests::0.2.0",
     )
   }
 }
\ No newline at end of file
diff --git a/example/cookies/build.sc b/example/cookies/build.sc
index 2816643a4a..699b94f947 100644
--- a/example/cookies/build.sc
+++ b/example/cookies/build.sc
@@ -2,7 +2,7 @@ import mill._, scalalib._
 
 
 trait AppModule extends ScalaModule{
-  def scalaVersion = "2.12.6"
+  def scalaVersion = "2.13.0"
   def ivyDeps = Agg(
     ivy"com.lihaoyi::cask:0.1.9",
   )
@@ -11,8 +11,8 @@ trait AppModule extends ScalaModule{
     def testFrameworks = Seq("utest.runner.Framework")
 
     def ivyDeps = Agg(
-      ivy"com.lihaoyi::utest::0.6.3",
-      ivy"com.lihaoyi::requests::0.1.5",
+      ivy"com.lihaoyi::utest::0.6.9",
+      ivy"com.lihaoyi::requests::0.2.0",
     )
   }
 }
\ No newline at end of file
diff --git a/example/decorated/build.sc b/example/decorated/build.sc
index 2816643a4a..699b94f947 100644
--- a/example/decorated/build.sc
+++ b/example/decorated/build.sc
@@ -2,7 +2,7 @@ import mill._, scalalib._
 
 
 trait AppModule extends ScalaModule{
-  def scalaVersion = "2.12.6"
+  def scalaVersion = "2.13.0"
   def ivyDeps = Agg(
     ivy"com.lihaoyi::cask:0.1.9",
   )
@@ -11,8 +11,8 @@ trait AppModule extends ScalaModule{
     def testFrameworks = Seq("utest.runner.Framework")
 
     def ivyDeps = Agg(
-      ivy"com.lihaoyi::utest::0.6.3",
-      ivy"com.lihaoyi::requests::0.1.5",
+      ivy"com.lihaoyi::utest::0.6.9",
+      ivy"com.lihaoyi::requests::0.2.0",
     )
   }
 }
\ No newline at end of file
diff --git a/example/decorated2/build.sc b/example/decorated2/build.sc
index 2816643a4a..699b94f947 100644
--- a/example/decorated2/build.sc
+++ b/example/decorated2/build.sc
@@ -2,7 +2,7 @@ import mill._, scalalib._
 
 
 trait AppModule extends ScalaModule{
-  def scalaVersion = "2.12.6"
+  def scalaVersion = "2.13.0"
   def ivyDeps = Agg(
     ivy"com.lihaoyi::cask:0.1.9",
   )
@@ -11,8 +11,8 @@ trait AppModule extends ScalaModule{
     def testFrameworks = Seq("utest.runner.Framework")
 
     def ivyDeps = Agg(
-      ivy"com.lihaoyi::utest::0.6.3",
-      ivy"com.lihaoyi::requests::0.1.5",
+      ivy"com.lihaoyi::utest::0.6.9",
+      ivy"com.lihaoyi::requests::0.2.0",
     )
   }
 }
\ No newline at end of file
diff --git a/example/endpoints/build.sc b/example/endpoints/build.sc
index 2816643a4a..699b94f947 100644
--- a/example/endpoints/build.sc
+++ b/example/endpoints/build.sc
@@ -2,7 +2,7 @@ import mill._, scalalib._
 
 
 trait AppModule extends ScalaModule{
-  def scalaVersion = "2.12.6"
+  def scalaVersion = "2.13.0"
   def ivyDeps = Agg(
     ivy"com.lihaoyi::cask:0.1.9",
   )
@@ -11,8 +11,8 @@ trait AppModule extends ScalaModule{
     def testFrameworks = Seq("utest.runner.Framework")
 
     def ivyDeps = Agg(
-      ivy"com.lihaoyi::utest::0.6.3",
-      ivy"com.lihaoyi::requests::0.1.5",
+      ivy"com.lihaoyi::utest::0.6.9",
+      ivy"com.lihaoyi::requests::0.2.0",
     )
   }
 }
\ No newline at end of file
diff --git a/example/formJsonPost/app/test/src/ExampleTests.scala b/example/formJsonPost/app/test/src/ExampleTests.scala
index 137a9780ee..148ebfdd1e 100644
--- a/example/formJsonPost/app/test/src/ExampleTests.scala
+++ b/example/formJsonPost/app/test/src/ExampleTests.scala
@@ -19,7 +19,7 @@ object ExampleTests extends TestSuite{
   val tests = Tests{
     'FormJsonPost - test(FormJsonPost){ host =>
       requests.post(s"$host/json", data = """{"value1": true, "value2": [3]}""").text() ==>
-        "OK true Vector(3)"
+        "OK true List(3)"
 
       requests.post(
         s"$host/form",
diff --git a/example/formJsonPost/build.sc b/example/formJsonPost/build.sc
index 2816643a4a..699b94f947 100644
--- a/example/formJsonPost/build.sc
+++ b/example/formJsonPost/build.sc
@@ -2,7 +2,7 @@ import mill._, scalalib._
 
 
 trait AppModule extends ScalaModule{
-  def scalaVersion = "2.12.6"
+  def scalaVersion = "2.13.0"
   def ivyDeps = Agg(
     ivy"com.lihaoyi::cask:0.1.9",
   )
@@ -11,8 +11,8 @@ trait AppModule extends ScalaModule{
     def testFrameworks = Seq("utest.runner.Framework")
 
     def ivyDeps = Agg(
-      ivy"com.lihaoyi::utest::0.6.3",
-      ivy"com.lihaoyi::requests::0.1.5",
+      ivy"com.lihaoyi::utest::0.6.9",
+      ivy"com.lihaoyi::requests::0.2.0",
     )
   }
 }
\ No newline at end of file
diff --git a/example/httpMethods/build.sc b/example/httpMethods/build.sc
index 2816643a4a..699b94f947 100644
--- a/example/httpMethods/build.sc
+++ b/example/httpMethods/build.sc
@@ -2,7 +2,7 @@ import mill._, scalalib._
 
 
 trait AppModule extends ScalaModule{
-  def scalaVersion = "2.12.6"
+  def scalaVersion = "2.13.0"
   def ivyDeps = Agg(
     ivy"com.lihaoyi::cask:0.1.9",
   )
@@ -11,8 +11,8 @@ trait AppModule extends ScalaModule{
     def testFrameworks = Seq("utest.runner.Framework")
 
     def ivyDeps = Agg(
-      ivy"com.lihaoyi::utest::0.6.3",
-      ivy"com.lihaoyi::requests::0.1.5",
+      ivy"com.lihaoyi::utest::0.6.9",
+      ivy"com.lihaoyi::requests::0.2.0",
     )
   }
 }
\ No newline at end of file
diff --git a/example/minimalApplication/build.sc b/example/minimalApplication/build.sc
index 2816643a4a..699b94f947 100644
--- a/example/minimalApplication/build.sc
+++ b/example/minimalApplication/build.sc
@@ -2,7 +2,7 @@ import mill._, scalalib._
 
 
 trait AppModule extends ScalaModule{
-  def scalaVersion = "2.12.6"
+  def scalaVersion = "2.13.0"
   def ivyDeps = Agg(
     ivy"com.lihaoyi::cask:0.1.9",
   )
@@ -11,8 +11,8 @@ trait AppModule extends ScalaModule{
     def testFrameworks = Seq("utest.runner.Framework")
 
     def ivyDeps = Agg(
-      ivy"com.lihaoyi::utest::0.6.3",
-      ivy"com.lihaoyi::requests::0.1.5",
+      ivy"com.lihaoyi::utest::0.6.9",
+      ivy"com.lihaoyi::requests::0.2.0",
     )
   }
 }
\ No newline at end of file
diff --git a/example/minimalApplication2/build.sc b/example/minimalApplication2/build.sc
index 2816643a4a..699b94f947 100644
--- a/example/minimalApplication2/build.sc
+++ b/example/minimalApplication2/build.sc
@@ -2,7 +2,7 @@ import mill._, scalalib._
 
 
 trait AppModule extends ScalaModule{
-  def scalaVersion = "2.12.6"
+  def scalaVersion = "2.13.0"
   def ivyDeps = Agg(
     ivy"com.lihaoyi::cask:0.1.9",
   )
@@ -11,8 +11,8 @@ trait AppModule extends ScalaModule{
     def testFrameworks = Seq("utest.runner.Framework")
 
     def ivyDeps = Agg(
-      ivy"com.lihaoyi::utest::0.6.3",
-      ivy"com.lihaoyi::requests::0.1.5",
+      ivy"com.lihaoyi::utest::0.6.9",
+      ivy"com.lihaoyi::requests::0.2.0",
     )
   }
 }
\ No newline at end of file
diff --git a/example/redirectAbort/build.sc b/example/redirectAbort/build.sc
index 2816643a4a..699b94f947 100644
--- a/example/redirectAbort/build.sc
+++ b/example/redirectAbort/build.sc
@@ -2,7 +2,7 @@ import mill._, scalalib._
 
 
 trait AppModule extends ScalaModule{
-  def scalaVersion = "2.12.6"
+  def scalaVersion = "2.13.0"
   def ivyDeps = Agg(
     ivy"com.lihaoyi::cask:0.1.9",
   )
@@ -11,8 +11,8 @@ trait AppModule extends ScalaModule{
     def testFrameworks = Seq("utest.runner.Framework")
 
     def ivyDeps = Agg(
-      ivy"com.lihaoyi::utest::0.6.3",
-      ivy"com.lihaoyi::requests::0.1.5",
+      ivy"com.lihaoyi::utest::0.6.9",
+      ivy"com.lihaoyi::requests::0.2.0",
     )
   }
 }
\ No newline at end of file
diff --git a/example/scalatags/build.sc b/example/scalatags/build.sc
index 3303601b5a..c89d9cc743 100644
--- a/example/scalatags/build.sc
+++ b/example/scalatags/build.sc
@@ -2,18 +2,18 @@ import mill._, scalalib._
 
 
 trait AppModule extends ScalaModule{
-  def scalaVersion = "2.12.6"
+  def scalaVersion = "2.13.0"
   def ivyDeps = Agg(
     ivy"com.lihaoyi::cask:0.1.9",
-    ivy"com.lihaoyi::scalatags:0.6.7",
+    ivy"com.lihaoyi::scalatags:0.7.0",
   )
 
   object test extends Tests{
     def testFrameworks = Seq("utest.runner.Framework")
 
     def ivyDeps = Agg(
-      ivy"com.lihaoyi::utest::0.6.3",
-      ivy"com.lihaoyi::requests::0.1.5",
+      ivy"com.lihaoyi::utest::0.6.9",
+      ivy"com.lihaoyi::requests::0.2.0",
     )
   }
 }
\ No newline at end of file
diff --git a/example/staticFiles/build.sc b/example/staticFiles/build.sc
index c83a0df174..911f9894ff 100644
--- a/example/staticFiles/build.sc
+++ b/example/staticFiles/build.sc
@@ -2,7 +2,7 @@ import mill._, scalalib._
 
 
 trait AppModule extends ScalaModule{
-  def scalaVersion = "2.12.6"
+  def scalaVersion = "2.13.0"
   def ivyDeps = Agg(
     ivy"com.lihaoyi::cask:0.1.9",
   )
@@ -13,8 +13,8 @@ trait AppModule extends ScalaModule{
     def testFrameworks = Seq("utest.runner.Framework")
 
     def ivyDeps = Agg(
-      ivy"com.lihaoyi::utest::0.6.3",
-      ivy"com.lihaoyi::requests::0.1.5",
+      ivy"com.lihaoyi::utest::0.6.9",
+      ivy"com.lihaoyi::requests::0.2.0",
     )
 
     def forkWorkingDir = build.millSourcePath
diff --git a/example/todo/build.sc b/example/todo/build.sc
index 093fb3f2b5..782aaef5fe 100644
--- a/example/todo/build.sc
+++ b/example/todo/build.sc
@@ -2,20 +2,20 @@ import mill._, scalalib._
 
 
 trait AppModule extends ScalaModule{
-  def scalaVersion = "2.12.6"
+  def scalaVersion = "2.13.0"
   def ivyDeps = Agg(
     ivy"com.lihaoyi::cask:0.1.9",
     ivy"org.xerial:sqlite-jdbc:3.18.0",
     ivy"io.getquill::quill-jdbc:2.5.4",
-    ivy"com.lihaoyi::scalatags:0.6.7",
+    ivy"com.lihaoyi::scalatags:0.7.0",
   )
 
   object test extends Tests{
     def testFrameworks = Seq("utest.runner.Framework")
 
     def ivyDeps = Agg(
-      ivy"com.lihaoyi::utest::0.6.3",
-      ivy"com.lihaoyi::requests::0.1.5",
+      ivy"com.lihaoyi::utest::0.6.9",
+      ivy"com.lihaoyi::requests::0.2.0",
     )
   }
 }
\ No newline at end of file
diff --git a/example/todoApi/build.sc b/example/todoApi/build.sc
index 2816643a4a..699b94f947 100644
--- a/example/todoApi/build.sc
+++ b/example/todoApi/build.sc
@@ -2,7 +2,7 @@ import mill._, scalalib._
 
 
 trait AppModule extends ScalaModule{
-  def scalaVersion = "2.12.6"
+  def scalaVersion = "2.13.0"
   def ivyDeps = Agg(
     ivy"com.lihaoyi::cask:0.1.9",
   )
@@ -11,8 +11,8 @@ trait AppModule extends ScalaModule{
     def testFrameworks = Seq("utest.runner.Framework")
 
     def ivyDeps = Agg(
-      ivy"com.lihaoyi::utest::0.6.3",
-      ivy"com.lihaoyi::requests::0.1.5",
+      ivy"com.lihaoyi::utest::0.6.9",
+      ivy"com.lihaoyi::requests::0.2.0",
     )
   }
 }
\ No newline at end of file
diff --git a/example/todoDb/build.sc b/example/todoDb/build.sc
index c6f8514166..ab1181eeae 100644
--- a/example/todoDb/build.sc
+++ b/example/todoDb/build.sc
@@ -2,7 +2,7 @@ import mill._, scalalib._
 
 
 trait AppModule extends ScalaModule{
-  def scalaVersion = "2.12.6"
+  def scalaVersion = "2.13.0"
   def ivyDeps = Agg(
     ivy"com.lihaoyi::cask:0.1.9",
     ivy"org.xerial:sqlite-jdbc:3.18.0",
@@ -13,8 +13,8 @@ trait AppModule extends ScalaModule{
     def testFrameworks = Seq("utest.runner.Framework")
 
     def ivyDeps = Agg(
-      ivy"com.lihaoyi::utest::0.6.3",
-      ivy"com.lihaoyi::requests::0.1.5",
+      ivy"com.lihaoyi::utest::0.6.9",
+      ivy"com.lihaoyi::requests::0.2.0",
     )
   }
 }
\ No newline at end of file
diff --git a/example/twirl/build.sc b/example/twirl/build.sc
index 362713333b..b8e174654d 100644
--- a/example/twirl/build.sc
+++ b/example/twirl/build.sc
@@ -1,14 +1,14 @@
 import mill._, scalalib._
-import $ivy.`com.lihaoyi::mill-contrib-twirllib:0.2.6-27-613878`
+import $ivy.`com.lihaoyi::mill-contrib-twirllib:0.4.1-4-158d11`
 
 trait AppModule extends ScalaModule with mill.twirllib.TwirlModule{
-  def scalaVersion = "2.12.6"
-  def twirlVersion = "1.3.15"
+  def scalaVersion = "2.13.0"
+  def twirlVersion = "1.5.0-M1"
 
   def generatedSources = T{ Seq(compileTwirl().classes) }
   def ivyDeps = Agg(
     ivy"com.lihaoyi::cask:0.1.9",
-    ivy"com.lihaoyi::scalatags:0.6.7",
+    ivy"com.lihaoyi::scalatags:0.7.0",
     ivy"com.typesafe.play::twirl-api:${twirlVersion()}",
   )
 
@@ -16,8 +16,8 @@ trait AppModule extends ScalaModule with mill.twirllib.TwirlModule{
     def testFrameworks = Seq("utest.runner.Framework")
 
     def ivyDeps = Agg(
-      ivy"com.lihaoyi::utest::0.6.3",
-      ivy"com.lihaoyi::requests::0.1.5",
+      ivy"com.lihaoyi::utest::0.6.9",
+      ivy"com.lihaoyi::requests::0.2.0",
     )
   }
 }
\ No newline at end of file
diff --git a/example/variableRoutes/app/test/src/ExampleTests.scala b/example/variableRoutes/app/test/src/ExampleTests.scala
index 49c960bd11..48455fa7e3 100644
--- a/example/variableRoutes/app/test/src/ExampleTests.scala
+++ b/example/variableRoutes/app/test/src/ExampleTests.scala
@@ -27,7 +27,7 @@ object ExampleTests extends TestSuite{
 
 
       requests.get(s"$host/post/123?param=xyz&param=abc").text() ==>
-        "Post 123 ArrayBuffer(xyz, abc)"
+        "Post 123 ArraySeq(xyz, abc)"
 
       requests.get(s"$host/post/123").text() ==>
         """Missing argument: (param: Seq[String])
diff --git a/example/variableRoutes/build.sc b/example/variableRoutes/build.sc
index 2816643a4a..699b94f947 100644
--- a/example/variableRoutes/build.sc
+++ b/example/variableRoutes/build.sc
@@ -2,7 +2,7 @@ import mill._, scalalib._
 
 
 trait AppModule extends ScalaModule{
-  def scalaVersion = "2.12.6"
+  def scalaVersion = "2.13.0"
   def ivyDeps = Agg(
     ivy"com.lihaoyi::cask:0.1.9",
   )
@@ -11,8 +11,8 @@ trait AppModule extends ScalaModule{
     def testFrameworks = Seq("utest.runner.Framework")
 
     def ivyDeps = Agg(
-      ivy"com.lihaoyi::utest::0.6.3",
-      ivy"com.lihaoyi::requests::0.1.5",
+      ivy"com.lihaoyi::utest::0.6.9",
+      ivy"com.lihaoyi::requests::0.2.0",
     )
   }
 }
\ No newline at end of file
diff --git a/example/websockets/build.sc b/example/websockets/build.sc
index 3661ee36b1..31f75f5d7a 100644
--- a/example/websockets/build.sc
+++ b/example/websockets/build.sc
@@ -2,7 +2,7 @@ import mill._, scalalib._
 
 
 trait AppModule extends ScalaModule{
-  def scalaVersion = "2.12.6"
+  def scalaVersion = "2.13.0"
   def ivyDeps = Agg(
     ivy"com.lihaoyi::cask:0.1.9",
   )
@@ -11,8 +11,8 @@ trait AppModule extends ScalaModule{
     def testFrameworks = Seq("utest.runner.Framework")
 
     def ivyDeps = Agg(
-      ivy"com.lihaoyi::utest::0.6.3",
-      ivy"com.lihaoyi::requests::0.1.5",
+      ivy"com.lihaoyi::utest::0.6.9",
+      ivy"com.lihaoyi::requests::0.2.0",
       ivy"org.asynchttpclient:async-http-client:2.5.2"
     )
   }