diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index e791ab0..b68b346
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,5 +5,5 @@ daiquiri
 pygtp>=0.4
 sgf==0.5
 profilehooks
-protobuf==3.1.0.post1
+protobuf==3.18.3
 six==1.10.0