diff --git a/gax/package.json b/gax/package.json
index 0233722b6..38eb5508e 100644
--- a/gax/package.json
+++ b/gax/package.json
@@ -51,7 +51,7 @@
     "mocha": "^9.0.0",
     "ncp": "^2.0.0",
     "null-loader": "^4.0.0",
-    "protobufjs-cli": "1.1.2",
+    "protobufjs-cli": "1.1.3",
     "proxyquire": "^2.0.1",
     "pumpify": "^2.0.0",
     "sinon": "^18.0.0",
diff --git a/tools/package.json b/tools/package.json
index 665c87d73..bd2b369bf 100644
--- a/tools/package.json
+++ b/tools/package.json
@@ -32,7 +32,7 @@
     "@babel/traverse": "^7.22.5",
     "google-gax": "^4.3.2",
     "google-proto-files": "^4.2.0",
-    "protobufjs-cli": "1.1.2",
+    "protobufjs-cli": "1.1.3",
     "uglify-js": "^3.17.0",
     "walk-up-path": "^3.0.1",
     "walkdir": "^0.4.0"