diff --git a/packages/featureserver/package.json b/packages/featureserver/package.json
index 66ec6ee1..67d89fc2 100644
--- a/packages/featureserver/package.json
+++ b/packages/featureserver/package.json
@@ -42,7 +42,7 @@
     "proxyquire": "^2.1.3",
     "should": "^13.2.3",
     "should-sinon": "0.0.6",
-    "sinon": "^18.0.0",
+    "sinon": "^20.0.0",
     "supertest": "^7.0.0"
   },
   "repository": {