diff --git a/packages/owlbot-bootstrapper/cli/package.json b/packages/owlbot-bootstrapper/cli/package.json
index f1fbeff809d..cbec9d4d6a0 100644
--- a/packages/owlbot-bootstrapper/cli/package.json
+++ b/packages/owlbot-bootstrapper/cli/package.json
@@ -43,7 +43,7 @@
     "gts": "^3.1.1",
     "mocha": "^10.0.0",
     "nock": "^13.2.9",
-    "sinon": "^15.0.0",
+    "sinon": "^18.0.1",
     "smee-client": "^1.2.3",
     "typescript": "~4.9.0"
   },