diff --git a/package.json b/package.json
index 8ad49e35..6b66f0fb 100644
--- a/package.json
+++ b/package.json
@@ -80,7 +80,7 @@
     "istanbul-instrumenter-loader": "3.0.0",
     "jquery": "3.3.1",
     "jquery-ui": "1.12.1",
-    "mocha": "5.0.2",
+    "mocha": "5.0.3",
     "mocha-loader": "1.1.3",
     "mocha-webpack": "1.0.1",
     "mousetrap": "1.6.1",
diff --git a/yarn.lock b/yarn.lock
index c9d925d8..2e93d001 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1965,9 +1965,9 @@ detect-node@^2.0.3:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/detect-node/-/detect-node-2.0.3.tgz#a2033c09cc8e158d37748fbde7507832bd6ce127"
 
-diff@3.3.1:
-  version "3.3.1"
-  resolved "https://registry.yarnpkg.com/diff/-/diff-3.3.1.tgz#aa8567a6eed03c531fc89d3f711cd0e5259dec75"
+diff@3.5.0:
+  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"
@@ -4364,14 +4364,14 @@ mocha-webpack@1.0.1:
     toposort "^1.0.0"
     yargs "^4.8.0"
 
-mocha@5.0.2:
-  version "5.0.2"
-  resolved "https://registry.yarnpkg.com/mocha/-/mocha-5.0.2.tgz#caab0b813575141c5690c37d53c894b605ae60b5"
+mocha@5.0.3:
+  version "5.0.3"
+  resolved "https://registry.yarnpkg.com/mocha/-/mocha-5.0.3.tgz#0a95a6ddea9073239851a3a26ffc9c8d679c757a"
   dependencies:
     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"