diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index b64e74b..d21348c
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ numpy==1.18.1
 oauthlib==3.1.0
 opt-einsum==3.1.0
 Pillow==7.0.0
-protobuf==3.11.3
+protobuf==3.18.3
 psycopg2==2.7.5
 pyasn1==0.4.8
 pyasn1-modules==0.2.8