diff --git a/build.sbt b/build.sbt
index 72a19343b9..d42b61c24c 100644
--- a/build.sbt
+++ b/build.sbt
@@ -73,7 +73,7 @@ val sharedSettings = assemblySettings ++ scalariformSettings ++ Seq(
     Opts.resolver.mavenLocalFile,
     Opts.resolver.sonatypeSnapshots,
     Opts.resolver.sonatypeReleases,
-    "Concurrent Maven Repo" at "http://conjars.org/repo",
+    "Concurrent Maven Repo" at "https://conjars.org/repo",
     "Twitter Maven" at "https://maven.twttr.com",
     "Cloudera" at "https://repository.cloudera.com/artifactory/cloudera-repos/"
   ),
@@ -194,17 +194,17 @@ val sharedSettings = assemblySettings ++ scalariformSettings ++ Seq(
         <developer>
           <id>posco</id>
           <name>Oscar Boykin</name>
-          <url>http://twitter.com/posco</url>
+          <url>https://twitter.com/posco</url>
         </developer>
         <developer>
           <id>avibryant</id>
           <name>Avi Bryant</name>
-          <url>http://twitter.com/avibryant</url>
+          <url>https://twitter.com/avibryant</url>
         </developer>
         <developer>
           <id>argyris</id>
           <name>Argyris Zymnis</name>
-          <url>http://twitter.com/argyris</url>
+          <url>https://twitter.com/argyris</url>
         </developer>
       </developers>)
 ) ++ mimaDefaultSettings
@@ -687,7 +687,7 @@ lazy val docSettings = Seq(
   micrositeDescription := "Scala API for Cascading.",
   micrositeAuthor := "Scalding's contributors",
   micrositeHighlightTheme := "atom-one-light",
-  micrositeHomepage := "http://twitter.github.io/scalding",
+  micrositeHomepage := "https://twitter.github.io/scalding",
   micrositeBaseUrl := "scalding",
   micrositeDocumentationUrl := "api",
   micrositeGithubOwner := "twitter",
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 4c535e9c8e..2294d9e17b 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,7 +1,7 @@
-resolvers += Resolver.url("artifactory", url("http://scalasbt.artifactoryonline.com/scalasbt/sbt-plugin-releases"))(Resolver.ivyStylePatterns)
+resolvers += Resolver.url("artifactory", url("https://scalasbt.artifactoryonline.com/scalasbt/sbt-plugin-releases"))(Resolver.ivyStylePatterns)
 
 resolvers ++= Seq(
-  "jgit-repo" at "http://download.eclipse.org/jgit/maven",
+  "jgit-repo" at "https://download.eclipse.org/jgit/maven",
   "sonatype-releases"  at "https://oss.sonatype.org/content/repositories/releases",
   "Twitter Maven" at "https://maven.twttr.com"
 )
diff --git a/sbt b/sbt
index 100fb3146e..a086e33291 100755
--- a/sbt
+++ b/sbt
@@ -13,10 +13,10 @@ declare -r latest_211="2.11.8"
 
 declare -r buildProps="project/build.properties"
 
-declare -r sbt_launch_ivy_release_repo="http://repo.typesafe.com/typesafe/ivy-releases"
+declare -r sbt_launch_ivy_release_repo="https://repo.typesafe.com/typesafe/ivy-releases"
 declare -r sbt_launch_ivy_snapshot_repo="https://repo.scala-sbt.org/scalasbt/ivy-snapshots"
-declare -r sbt_launch_mvn_release_repo="http://repo.scala-sbt.org/scalasbt/maven-releases"
-declare -r sbt_launch_mvn_snapshot_repo="http://repo.scala-sbt.org/scalasbt/maven-snapshots"
+declare -r sbt_launch_mvn_release_repo="https://repo.scala-sbt.org/scalasbt/maven-releases"
+declare -r sbt_launch_mvn_snapshot_repo="https://repo.scala-sbt.org/scalasbt/maven-snapshots"
 
 declare -r default_jvm_opts_common="-Xms512m -Xmx1536m -Xss2m"
 declare -r noshare_opts="-Dsbt.global.base=project/.sbtboot -Dsbt.boot.directory=project/.boot -Dsbt.ivy.home=project/.ivy"
@@ -116,7 +116,7 @@ url_base () {
   local version="$1"
 
   case "$version" in
-        0.7.*) echo "http://simple-build-tool.googlecode.com" ;;
+        0.7.*) echo "https://simple-build-tool.googlecode.com" ;;
       0.10.* ) echo "$sbt_launch_ivy_release_repo" ;;
     0.11.[12]) echo "$sbt_launch_ivy_release_repo" ;;
     0.*-[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]-[0-9][0-9][0-9][0-9][0-9][0-9]) # ie "*-yyyymmdd-hhMMss"
diff --git a/scalding-core/src/main/scala/com/twitter/scalding/mathematics/TypedSimilarity.scala b/scalding-core/src/main/scala/com/twitter/scalding/mathematics/TypedSimilarity.scala
index 593ae42aaf..42da7c6bbc 100644
--- a/scalding-core/src/main/scala/com/twitter/scalding/mathematics/TypedSimilarity.scala
+++ b/scalding-core/src/main/scala/com/twitter/scalding/mathematics/TypedSimilarity.scala
@@ -144,7 +144,7 @@ object TypedSimilarity extends Serializable {
    * key: document,
    * value: (word, documentsWithWord)
    * return: Edge of similarity between words measured by documents
-   * See: http://arxiv.org/pdf/1206.2082v2.pdf
+   * See: https://arxiv.org/pdf/1206.2082v2.pdf
    */
   def discoCosineSimilarity[N: Ordering](smallG: Grouped[N, (N, Int)],
     bigG: Grouped[N, (N, Int)], oversample: Double): TypedPipe[Edge[N, Double]] = {
@@ -181,7 +181,7 @@ object TypedSimilarity extends Serializable {
    * key: document,
    * value: (word, word weight in the document, norm of the word)
    * return: Edge of similarity between words measured by documents
-   * See: http://stanford.edu/~rezab/papers/dimsum.pdf
+   * See: https://stanford.edu/~rezab/papers/dimsum.pdf
    */
   def dimsumCosineSimilarity[N: Ordering](smallG: Grouped[N, (N, Double, Double)],
     bigG: Grouped[N, (N, Double, Double)], oversample: Double): TypedPipe[Edge[N, Double]] = {
@@ -236,7 +236,7 @@ class ExactInCosine[N](reducers: Int = -1)(implicit override val nodeOrdering: O
  * minCos: the minimum cosine similarity you care about accuracy for
  * delta: the error on the approximated cosine (e.g. 0.05 = 5%)
  * boundedProb: the probability we have larger than delta error
- * see: http://arxiv.org/pdf/1206.2082v2.pdf for more details
+ * see: https://arxiv.org/pdf/1206.2082v2.pdf for more details
  */
 class DiscoInCosine[N](minCos: Double, delta: Double, boundedProb: Double, reducers: Int = -1)(implicit override val nodeOrdering: Ordering[N]) extends TypedSimilarity[N, InDegree, Double] {
 
diff --git a/scripts/scald.rb b/scripts/scald.rb
index 7e8770bbfe..59912a4372 100755
--- a/scripts/scald.rb
+++ b/scripts/scald.rb
@@ -330,13 +330,13 @@ def convert_dependencies_to_jars(dependencies = DEPENDENCIES, as_classpath = fal
 #Convert a maven dependency to a url for downloading.
 #Example:
 #Input dependency: org.apache.hadoop/hadoop-core/0.20.2
-#Output url: http://repo1.maven.org/maven2/org/apache/hadoop/hadoop-core/0.20.2/hadoop-core-0.20.2.jar
+#Output url: https://repo1.maven.org/maven2/org/apache/hadoop/hadoop-core/0.20.2/hadoop-core-0.20.2.jar
 def dependency_to_url(dependency)
   #Each dependency is in the form group/artifact/version.
   group, artifact, version = dependency.split("/")
   jar_filename = dependency_to_jar(dependency)
   group_with_slash = group.split(".").join("/")
-  "http://repo1.maven.org/maven2/#{group_with_slash}/#{artifact}/#{version}/#{jar_filename}"
+  "https://repo1.maven.org/maven2/#{group_with_slash}/#{artifact}/#{version}/#{jar_filename}"
 end
 
 #Convert a maven dependency to the name of its jar file.