diff --git a/test/lib/mocha-1.18.2/package.json b/test/lib/mocha-1.18.2/package.json
index 8349114..d184b72 100644
--- a/test/lib/mocha-1.18.2/package.json
+++ b/test/lib/mocha-1.18.2/package.json
@@ -29,7 +29,7 @@
     "commander": "2.0.0",
     "growl": "1.7.x",
     "jade": "0.26.3",
-    "diff": "1.0.7",
+    "diff": "8.0.3",
     "debug": "*",
     "mkdirp": "0.3.5",
     "glob": "3.2.3"