diff --git a/package.json b/package.json
index fd23802..8790659 100644
--- a/package.json
+++ b/package.json
@@ -53,7 +53,7 @@
     "mocha-junit-reporter": "^1.23.1",
     "nyc": "^14.1.1",
     "prettier-standard": "^16.1.0",
-    "sinon": "^7.5.0",
+    "sinon": "^9.0.2",
     "sinon-chai": "^3.3.0",
     "standard": "^14.2.0"
   },