diff --git a/packages/karma/package.json b/packages/karma/package.json
index 453bb840b..5a110e73c 100644
--- a/packages/karma/package.json
+++ b/packages/karma/package.json
@@ -23,7 +23,7 @@
     "karma-mocha": "^1.3.0",
     "karma-mocha-reporter": "^2.2.4",
     "karma-webpack": "^2.0.4",
-    "mocha": "^3.5.3",
+    "mocha": "^4.0.0",
     "mocha-coverage-reporter": "^0.0.1",
     "ramda": "^0.25.0",
     "webpack": "^3.6.0"
diff --git a/packages/mocha/package.json b/packages/mocha/package.json
index dfd55c2f6..8202ca454 100644
--- a/packages/mocha/package.json
+++ b/packages/mocha/package.json
@@ -17,7 +17,7 @@
     "babel-register": "^6.26.0",
     "change-case": "^3.0.1",
     "deepmerge": "^2.0.0",
-    "mocha": "^3.5.3",
+    "mocha": "^4.0.0",
     "ramda": "^0.25.0"
   },
   "peerDependencies": {
diff --git a/yarn.lock b/yarn.lock
index 8347a02ad..508b648e5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2925,7 +2925,7 @@ debug@2.6.8:
   dependencies:
     ms "2.0.0"
 
-debug@^3.0.1, debug@^3.1.0:
+debug@3.1.0, debug@^3.0.1, debug@^3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/debug/-/debug-3.1.0.tgz#5bb5a0672628b64149566ba16819e61518c67261"
   dependencies:
@@ -3085,6 +3085,10 @@ diff@3.2.0:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/diff/-/diff-3.2.0.tgz#c9ce393a4b7cbd0b058a725c93df299027868ff9"
 
+diff@3.3.1:
+  version "3.3.1"
+  resolved "https://registry.yarnpkg.com/diff/-/diff-3.3.1.tgz#aa8567a6eed03c531fc89d3f711cd0e5259dec75"
+
 diff@^3.2.0, diff@^3.3.1:
   version "3.4.0"
   resolved "https://registry.yarnpkg.com/diff/-/diff-3.4.0.tgz#b1d85507daf3964828de54b37d0d73ba67dda56c"
@@ -4516,24 +4520,24 @@ glob@7.1.1:
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
-glob@^5.0.15:
-  version "5.0.15"
-  resolved "https://registry.yarnpkg.com/glob/-/glob-5.0.15.tgz#1bc936b9e02f4a603fcc222ecf7633d30b8b93b1"
+glob@7.1.2, glob@^7.0.0, glob@^7.0.3, glob@^7.0.5, glob@^7.0.6, glob@^7.1.1, glob@^7.1.2, glob@~7.1.2:
+  version "7.1.2"
+  resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.2.tgz#c19c9df9a028702d678612384a6552404c636d15"
   dependencies:
+    fs.realpath "^1.0.0"
     inflight "^1.0.4"
     inherits "2"
-    minimatch "2 || 3"
+    minimatch "^3.0.4"
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
-glob@^7.0.0, glob@^7.0.3, glob@^7.0.5, glob@^7.0.6, glob@^7.1.1, glob@^7.1.2, glob@~7.1.2:
-  version "7.1.2"
-  resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.2.tgz#c19c9df9a028702d678612384a6552404c636d15"
+glob@^5.0.15:
+  version "5.0.15"
+  resolved "https://registry.yarnpkg.com/glob/-/glob-5.0.15.tgz#1bc936b9e02f4a603fcc222ecf7633d30b8b93b1"
   dependencies:
-    fs.realpath "^1.0.0"
     inflight "^1.0.4"
     inherits "2"
-    minimatch "^3.0.4"
+    minimatch "2 || 3"
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
@@ -4645,6 +4649,10 @@ grouped-queue@^0.3.3:
   dependencies:
     lodash "^4.17.2"
 
+growl@1.10.3:
+  version "1.10.3"
+  resolved "https://registry.yarnpkg.com/growl/-/growl-1.10.3.tgz#1926ba90cf3edfe2adb4927f5880bc22c66c790f"
+
 growl@1.9.2:
   version "1.9.2"
   resolved "https://registry.yarnpkg.com/growl/-/growl-1.9.2.tgz#0ea7743715db8d8de2c5ede1775e1b45ac85c02f"
@@ -6836,6 +6844,21 @@ mocha@^3.5.3:
     mkdirp "0.5.1"
     supports-color "3.1.2"
 
+mocha@^4.0.0:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/mocha/-/mocha-4.0.1.tgz#0aee5a95cf69a4618820f5e51fa31717117daf1b"
+  dependencies:
+    browser-stdout "1.3.0"
+    commander "2.11.0"
+    debug "3.1.0"
+    diff "3.3.1"
+    escape-string-regexp "1.0.5"
+    glob "7.1.2"
+    growl "1.10.3"
+    he "1.1.1"
+    mkdirp "0.5.1"
+    supports-color "4.4.0"
+
 modify-values@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/modify-values/-/modify-values-1.0.0.tgz#e2b6cdeb9ce19f99317a53722f3dbf5df5eaaab2"
@@ -9670,6 +9693,12 @@ supports-color@3.1.2:
   dependencies:
     has-flag "^1.0.0"
 
+supports-color@4.4.0:
+  version "4.4.0"
+  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-4.4.0.tgz#883f7ddabc165142b2a61427f3352ded195d1a3e"
+  dependencies:
+    has-flag "^2.0.0"
+
 supports-color@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-2.0.0.tgz#535d045ce6b6363fa40117084629995e9df324c7"