diff --git a/package.json b/package.json
index b1880f3..cd5604f 100644
--- a/package.json
+++ b/package.json
@@ -49,7 +49,7 @@
     "babel-preset-stage-1": "^6.24.1",
     "babel-register": "^6.24.1",
     "chai": "^4.1.2",
-    "del": "^3.0.0",
+    "del": "^4.0.0",
     "eslint": "^4.2.0",
     "eslint-config-strict": "^14.0.0",
     "eslint-plugin-import": "^2.7.0",
diff --git a/yarn.lock b/yarn.lock
index 8e393bb..dcbd589 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -914,16 +914,17 @@ del@^2.0.2:
     pinkie-promise "^2.0.0"
     rimraf "^2.2.8"
 
-del@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/del/-/del-3.0.0.tgz#53ecf699ffcbcb39637691ab13baf160819766e5"
+del@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/del/-/del-4.0.0.tgz#4fa27e92c366cb45b9bdaa56a9b8703dced17437"
+  integrity sha512-/BnSJ+SuZyLu7xMn48kZY0nMXDi+5KNmR4g8n21Wivsl8+B9njV6/5kcTNE9juSprp0zRWBU28JuHUq0FqK1Nw==
   dependencies:
     globby "^6.1.0"
-    is-path-cwd "^1.0.0"
-    is-path-in-cwd "^1.0.0"
-    p-map "^1.1.1"
-    pify "^3.0.0"
-    rimraf "^2.2.8"
+    is-path-cwd "^2.0.0"
+    is-path-in-cwd "^2.0.0"
+    p-map "^2.0.0"
+    pify "^4.0.1"
+    rimraf "^2.6.2"
 
 deprecated@^0.0.1:
   version "0.0.1"
@@ -1435,6 +1436,18 @@ glob@^7.0.3, glob@^7.0.5, glob@^7.1.2:
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
+glob@^7.1.3:
+  version "7.1.3"
+  resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.3.tgz#3960832d3f1574108342dafd3a67b332c0969df1"
+  integrity sha512-vcfuiIxogLV4DlGBHIUOwI0IbrJ8HWPc4MU7HzviGeNho/UJDfi6B5p3sHeWIQ0KGIU0Jpxi5ZHxemQfLkkAwQ==
+  dependencies:
+    fs.realpath "^1.0.0"
+    inflight "^1.0.4"
+    inherits "2"
+    minimatch "^3.0.4"
+    once "^1.3.0"
+    path-is-absolute "^1.0.0"
+
 glob@~3.1.21:
   version "3.1.21"
   resolved "https://registry.yarnpkg.com/glob/-/glob-3.1.21.tgz#d29e0a055dea5138f4d07ed40e8982e83c2066cd"
@@ -1772,12 +1785,24 @@ is-path-cwd@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/is-path-cwd/-/is-path-cwd-1.0.0.tgz#d225ec23132e89edd38fda767472e62e65f1106d"
 
+is-path-cwd@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/is-path-cwd/-/is-path-cwd-2.0.0.tgz#d4777a8e227a00096a31f030db3770f84b116c02"
+  integrity sha512-m5dHHzpOXEiv18JEORttBO64UgTEypx99vCxQLjbBvGhOJxnTNglYoFXxwo6AbsQb79sqqycQEHv2hWkHZAijA==
+
 is-path-in-cwd@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/is-path-in-cwd/-/is-path-in-cwd-1.0.0.tgz#6477582b8214d602346094567003be8a9eac04dc"
   dependencies:
     is-path-inside "^1.0.0"
 
+is-path-in-cwd@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/is-path-in-cwd/-/is-path-in-cwd-2.0.0.tgz#68e452a6eec260500cec21e029c0a44cc0dcd2ea"
+  integrity sha512-6Vz5Gc9s/sDA3JBVu0FzWufm8xaBsqy1zn8Q6gmvGP6nSDMw78aS4poBNeatWjaRpTpxxLn1WOndAiOlk+qY8A==
+  dependencies:
+    is-path-inside "^1.0.0"
+
 is-path-inside@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/is-path-inside/-/is-path-inside-1.0.0.tgz#fc06e5a1683fbda13de667aff717bbc10a48f37f"
@@ -2342,9 +2367,10 @@ p-locate@^2.0.0:
   dependencies:
     p-limit "^1.1.0"
 
-p-map@^1.1.1:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/p-map/-/p-map-1.1.1.tgz#05f5e4ae97a068371bc2a5cc86bfbdbc19c4ae7a"
+p-map@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/p-map/-/p-map-2.0.0.tgz#be18c5a5adeb8e156460651421aceca56c213a50"
+  integrity sha512-GO107XdrSUmtHxVoi60qc9tUl/KkNKm+X2CF4P9amalpGxv5YqVPJNfSb0wcA+syCopkZvYYIzW8OVTQW59x/w==
 
 packet-reader@0.3.1:
   version "0.3.1"
@@ -2471,9 +2497,10 @@ pify@^2.0.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/pify/-/pify-2.3.0.tgz#ed141a6ac043a849ea588498e7dca8b15330e90c"
 
-pify@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/pify/-/pify-3.0.0.tgz#e5a4acd2c101fdf3d9a4d07f0dbc4db49dd28176"
+pify@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/pify/-/pify-4.0.1.tgz#4b2cd25c50d598735c50292224fd8c6df41e3231"
+  integrity sha512-uB80kBFb/tfd68bVleG9T5GGsGPjJrLAUpR5PZIrhBnIaRTQRjqdJSsIKkOP6OAIFbj7GOrcudc5pNjZ+geV2g==
 
 pinkie-promise@^2.0.0:
   version "2.0.1"
@@ -2717,6 +2744,13 @@ rimraf@^2.2.8:
   dependencies:
     glob "^7.0.5"
 
+rimraf@^2.6.2:
+  version "2.6.3"
+  resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.6.3.tgz#b2d104fe0d8fb27cf9e0a1cda8262dd3833c6cab"
+  integrity sha512-mwqeW5XsA2qAejG46gYdENaxXjx9onRNCfn7L0duuP4hCuTIi/QO7PDK07KJfp1d+izWPrzEJDcSqBa0OZQriA==
+  dependencies:
+    glob "^7.1.3"
+
 run-async@^2.2.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/run-async/-/run-async-2.3.0.tgz#0371ab4ae0bdd720d4166d7dfda64ff7a445a6c0"