diff --git a/package.json b/package.json
index a46d1e476ad..9e9d5788070 100644
--- a/package.json
+++ b/package.json
@@ -94,7 +94,7 @@
     "esprima": "^4.0.1",
     "istanbul": "^0.4.5",
     "jsdoc": "^3.5.5",
-    "karma": "^4.0.0",
+    "karma": "^3.1.4",
     "karma-babel-preprocessor": "^8.0.0",
     "karma-chrome-launcher": "^2.2.0",
     "karma-mocha": "^1.3.0",