diff --git a/package-overrides/npm/mocha@2.2.5.json b/package-overrides/npm/mocha@2.2.5.json
new file mode 100644
index 0000000..327a3cf
--- /dev/null
+++ b/package-overrides/npm/mocha@2.2.5.json
@@ -0,0 +1,14 @@
+{
+  "browser": "mocha",
+  "main": "mocha",
+  "shim": {
+    "mocha": {
+      "deps": ["./mocha.css!"],
+      "exports": "mocha"
+    }
+  },
+  "dependencies": {
+    "css": "*"
+  },
+  "registry": "jspm"
+}