diff --git a/handwritten/datastore/package.json b/handwritten/datastore/package.json
index 0982830fe271..83a407b48880 100644
--- a/handwritten/datastore/package.json
+++ b/handwritten/datastore/package.json
@@ -52,7 +52,7 @@
     "extend": "^3.0.2",
     "google-gax": "^5.0.2-rc.1",
     "is": "^3.3.0",
-    "protobufjs": "7.4.0",
+    "protobufjs": "7.5.5",
     "split-array-stream": "^2.0.0",
     "stream-events": "^1.0.5"
   },