diff --git a/package.json b/package.json
index ed43b02..06adb21 100644
--- a/package.json
+++ b/package.json
@@ -31,6 +31,6 @@
     "babel-preset-es2015": "6.24.1",
     "babel-preset-stage-0": "6.24.1",
     "babel-polyfill": "6.26.0",
-    "mocha": "4.0.1"
+    "mocha": "5.0.1"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index d8adc36..e0f53a6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1321,9 +1321,9 @@ mkdirp@0.5.1, "mkdirp@>=0.5 0", mkdirp@^0.5.1:
   dependencies:
     minimist "0.0.8"
 
-mocha@4.0.1:
-  version "4.0.1"
-  resolved "https://registry.yarnpkg.com/mocha/-/mocha-4.0.1.tgz#0aee5a95cf69a4618820f5e51fa31717117daf1b"
+mocha@5.0.1:
+  version "5.0.1"
+  resolved "https://registry.yarnpkg.com/mocha/-/mocha-5.0.1.tgz#759b62c836b0732382a62b6b1fb245ec1bc943ac"
   dependencies:
     browser-stdout "1.3.0"
     commander "2.11.0"