diff --git a/setup.py b/setup.py
old mode 100755
new mode 100644
index 1091a67..8abe79d
--- a/setup.py
+++ b/setup.py
@@ -41,7 +41,7 @@ def version():
     package_dir = {"": "python"},
     install_requires = [
         "grpcio==1.39.0",
-        "protobuf==3.17.3",
+        "protobuf==3.18.3",
         "grpcio-tools==1.39.0",
         "googleapis-common-protos==1.52.0"
     ],