diff --git a/functions/spanner/package.json b/functions/spanner/package.json
index 3ccceff481..bf122a06dc 100644
--- a/functions/spanner/package.json
+++ b/functions/spanner/package.json
@@ -20,6 +20,6 @@
   "devDependencies": {
     "mocha": "^9.1.2",
     "proxyquire": "^2.1.0",
-    "sinon": "^9.0.0"
+    "sinon": "^19.0.0"
   }
 }