diff --git a/packages/socket-mode/package.json b/packages/socket-mode/package.json
index 1b765f036..e61c49bac 100644
--- a/packages/socket-mode/package.json
+++ b/packages/socket-mode/package.json
@@ -68,7 +68,7 @@
     "nodemon": "^3.1.0",
     "proxyquire": "^2.1.3",
     "shx": "^0.4.0",
-    "sinon": "^20",
+    "sinon": "^21",
     "source-map-support": "^0.5.21",
     "ts-node": "^10",
     "typescript": "5.8.3"