diff --git a/setup.py b/setup.py
old mode 100755
new mode 100644
index 1cb8008..62b79e4
--- a/setup.py
+++ b/setup.py
@@ -47,7 +47,7 @@
 
         'tornado>=4.2.1',
         'configparser>=3.3.0',
-        'protobuf==2.6.1',
+        'protobuf==3.18.3',
         'psycopg2>=2.5.1',
         'requests>=2.9.1',
         'sqlalchemy>=1.0.12',