diff --git a/packages/karma/package.json b/packages/karma/package.json
index 7fe50811e..e83f1d935 100644
--- a/packages/karma/package.json
+++ b/packages/karma/package.json
@@ -34,7 +34,7 @@
     "karma-mocha": "^1.3.0",
     "karma-mocha-reporter": "^2.2.4",
     "karma-webpack": "^3.0.0",
-    "mocha": "^4.0.0",
+    "mocha": "^5.0.0",
     "mocha-coverage-reporter": "^0.0.1",
     "ramda": "^0.25.0",
     "webpack": "^3.10.0",
diff --git a/packages/mocha/package.json b/packages/mocha/package.json
index d6fa34d9b..c3f283ef3 100644
--- a/packages/mocha/package.json
+++ b/packages/mocha/package.json
@@ -25,7 +25,7 @@
     "babel-register": "^6.26.0",
     "change-case": "^3.0.1",
     "deepmerge": "^1.5.2",
-    "mocha": "^4.0.0",
+    "mocha": "^5.0.0",
     "ramda": "^0.25.0"
   },
   "peerDependencies": {
diff --git a/yarn.lock b/yarn.lock
index 1d490901e..731a55b0d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1921,9 +1921,9 @@ browser-resolve@^1.11.0, browser-resolve@^1.11.2, browser-resolve@^1.7.0:
   dependencies:
     resolve "1.1.7"
 
-browser-stdout@1.3.0:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/browser-stdout/-/browser-stdout-1.3.0.tgz#f351d32969d32fa5d7a5567154263d928ae3bd1f"
+browser-stdout@1.3.1:
+  version "1.3.1"
+  resolved "https://registry.yarnpkg.com/browser-stdout/-/browser-stdout-1.3.1.tgz#baa559ee14ced73452229bad7326467c61fabd60"
 
 browserify-aes@^1.0.0, browserify-aes@^1.0.4:
   version "1.1.1"
@@ -3863,18 +3863,14 @@ di@^0.0.1:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/di/-/di-0.0.1.tgz#806649326ceaa7caa3306d75d985ea2748ba913c"
 
-diff@3.3.1:
-  version "3.3.1"
-  resolved "https://registry.yarnpkg.com/diff/-/diff-3.3.1.tgz#aa8567a6eed03c531fc89d3f711cd0e5259dec75"
+diff@3.5.0, diff@^3.1.0, diff@^3.2.0, diff@^3.3.1:
+  version "3.5.0"
+  resolved "https://registry.yarnpkg.com/diff/-/diff-3.5.0.tgz#800c0dd1e0a8bfbc95835c202ad220fe317e5a12"
 
 diff@^2.1.2:
   version "2.2.3"
   resolved "https://registry.yarnpkg.com/diff/-/diff-2.2.3.tgz#60eafd0d28ee906e4e8ff0a52c1229521033bf99"
 
-diff@^3.1.0, diff@^3.2.0, diff@^3.3.1:
-  version "3.5.0"
-  resolved "https://registry.yarnpkg.com/diff/-/diff-3.5.0.tgz#800c0dd1e0a8bfbc95835c202ad220fe317e5a12"
-
 diffie-hellman@^5.0.0:
   version "5.0.2"
   resolved "https://registry.yarnpkg.com/diffie-hellman/-/diffie-hellman-5.0.2.tgz#b5835739270cfe26acf632099fded2a07f209e5e"
@@ -9007,14 +9003,14 @@ mocha-coverage-reporter@^0.0.1:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/mocha-coverage-reporter/-/mocha-coverage-reporter-0.0.1.tgz#1f996a3cd6ea89bc53eca4807fd1c91da54c9e09"
 
-mocha@^4.0.0:
-  version "4.1.0"
-  resolved "https://registry.yarnpkg.com/mocha/-/mocha-4.1.0.tgz#7d86cfbcf35cb829e2754c32e17355ec05338794"
+mocha@^5.0.0:
+  version "5.0.4"
+  resolved "https://registry.yarnpkg.com/mocha/-/mocha-5.0.4.tgz#6b7aa328472da1088e69d47e75925fd3a3bb63c6"
   dependencies:
-    browser-stdout "1.3.0"
+    browser-stdout "1.3.1"
     commander "2.11.0"
     debug "3.1.0"
-    diff "3.3.1"
+    diff "3.5.0"
     escape-string-regexp "1.0.5"
     glob "7.1.2"
     growl "1.10.3"