diff --git a/package.json b/package.json
index 6d65310..07359eb 100644
--- a/package.json
+++ b/package.json
@@ -55,7 +55,7 @@
     "karma-mocha": "^1.2.0",
     "karma-spec-reporter": "0.0.31",
     "mocha": "^3.1.2",
-    "sinon": "^3.2.1",
+    "sinon": "^4.2.0",
     "sinon-chai": "^2.13.0",
     "tap-spec": "^4.1.1",
     "tape": "^4.8.0"