diff --git a/support/MuGo-master/requirements.txt b/support/MuGo-master/requirements.txt
old mode 100755
new mode 100644
index 26958ad..aee98b2
--- a/support/MuGo-master/requirements.txt
+++ b/support/MuGo-master/requirements.txt
@@ -3,6 +3,6 @@ numpy
 pygtp>=0.4
 sgf==0.5
 tensorflow>=1.2
-protobuf==3.1.0.post1
+protobuf==3.18.3
 six==1.10.0
 gtp