diff --git a/package.json b/package.json
index 1fc1d05..3a3c173 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "karma-sinon": "^1.0.5",
     "mocha": "^3.1.0",
     "power-assert": "^1.4.4",
-    "sinon": "^4.0.0"
+    "sinon": "^5.0.6"
   },
   "files": [
     "README.md",