diff --git a/package.json b/package.json
index 0f03658..76c94b9 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,7 @@
     "eslint-config-pedant": "^0.9.0",
     "nyc": "^10.0.0",
     "proxyquire": "^1.7.7",
-    "sinon": "^2.1.0",
+    "sinon": "^2.3.4",
     "tslint": "^5.0.0",
     "tslint-config-typings": "^0.3.1",
     "typescript": "^2.2.2"