diff --git a/package.json b/package.json
index 48f4819..488f595 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "requirejs": "^2.3.6",
     "run-for-every-file": "^1.1.0",
     "shenanigans-manager": "^0.2.36",
-    "sinon": "^7.3.1",
+    "sinon": "^9.0.0",
     "sinon-chai": "^3.3.0",
     "tslint": "5.15.0",
     "tsutils": "^3.10.0",