diff --git a/package-lock.json b/package-lock.json
index 4ce374a884..ff13f2743e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9091,14 +9091,14 @@
       }
     },
     "node_modules/protobufjs": {
-      "version": "8.3.0",
-      "resolved": "https://registry.npmjs.org/protobufjs/-/protobufjs-8.3.0.tgz",
-      "integrity": "sha512-JpJpFaR7yKNb6WqKvJJ1MLbiuIQWQnbUUb06nDtf2/i8YWYYLEfP6xf9BwSJoJQg1wAy61EQB8dssQg64oX4aA==",
+      "version": "8.4.0",
+      "resolved": "https://registry.npmjs.org/protobufjs/-/protobufjs-8.4.0.tgz",
+      "integrity": "sha512-iriNhQ57SYA5Jbdi+41AyPdx6jPPkFO7DODzkOBmqFhgYn/JzX2HxgxYPY18eQAs3CP/AWqtPvkWn8rclRAxdQ==",
       "dev": true,
       "hasInstallScript": true,
       "license": "BSD-3-Clause",
       "dependencies": {
-        "long": "^5.0.0"
+        "long": "^5.3.2"
       },
       "engines": {
         "node": ">=12.0.0"
@@ -10520,7 +10520,7 @@
       },
       "devDependencies": {
         "avro-js": "^1.12.1",
-        "protobufjs": "^8.3.0",
+        "protobufjs": "^8.4.0",
         "zod": "^4.4.3"
       },
       "peerDependencies": {
diff --git a/packages/kafka/package.json b/packages/kafka/package.json
index e1d00e5d95..8fc84e6af2 100644
--- a/packages/kafka/package.json
+++ b/packages/kafka/package.json
@@ -116,7 +116,7 @@
   },
   "devDependencies": {
     "avro-js": "^1.12.1",
-    "protobufjs": "^8.3.0",
+    "protobufjs": "^8.4.0",
     "zod": "^4.4.3"
   }
 }