diff --git a/package.json b/package.json
index 836220c..8ce87c9 100644
--- a/package.json
+++ b/package.json
@@ -49,6 +49,9 @@
     "shared-karma-files": "git://github.com/karma-runner/shared-karma-files.git#82ae8d02",
     "sinon": "^1.17.2"
   },
+  "peerDependencies": {
+    "mocha": "^3.0.0"
+  },
   "license": "MIT",
   "contributors": [
     "Maksim Ryzhikov <rv.maksim@gmail.com>",