diff --git a/package.json b/package.json
index 108f7ff..2b37b0f 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
     "rollup-plugin-node-resolve": "3.0.0",
     "rollup-plugin-sourcemaps": "^0.4.1",
     "rollup-plugin-uglify": "^2.0.1",
-    "sinon": "4.1.3"
+    "sinon": "5.0.3"
   },
   "keywords": [
     "router",