diff --git a/package.json b/package.json
index 118e3aa..ff39516 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,7 @@
     "jsdom-global": "^3.0.2",
     "mocha": "^6.1.4",
     "nyc": "^14.1.1",
-    "sinon": "^7.2.3",
+    "sinon": "^9.0.2",
     "sinon-chai": "^3.0.0"
   },
   "dependencies": {