diff --git a/package.json b/package.json
index a2e6709..ded2a79 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,7 @@
     "selenium-webdriver": "4.0.0-alpha.8",
     "serve-static": "1.14.1",
     "shelljs": "0.8.4",
-    "sinon": "7.5.0",
+    "sinon": "9.2.4",
     "tap-nirvana": "1.1.0",
     "tape": "4.13.3",
     "tape-async": "2.3.0",