diff --git a/package.json b/package.json
index 6b50dbe5..ada4466a 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
     "generate-changelog": "1.7.0",
     "hubot-test-helper": "1.8.1",
     "istanbul": "0.4.5",
-    "mocha": "4.1.0",
+    "mocha": "5.0.0",
     "proxyquire": "1.8.0"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 66ec7f2b..c7e59384 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1249,9 +1249,9 @@ mkdirp@0.5.1, mkdirp@0.5.x:
   dependencies:
     minimist "0.0.8"
 
-mocha@4.1.0:
-  version "4.1.0"
-  resolved "https://registry.yarnpkg.com/mocha/-/mocha-4.1.0.tgz#7d86cfbcf35cb829e2754c32e17355ec05338794"
+mocha@5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/mocha/-/mocha-5.0.0.tgz#cccac988b0bc5477119cba0e43de7af6d6ad8f4e"
   dependencies:
     browser-stdout "1.3.0"
     commander "2.11.0"