diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index b34878c..158e9fb
--- a/requirements.txt
+++ b/requirements.txt
@@ -62,7 +62,7 @@ Pillow==4.2.1
 ply==3.8
 progressbar33==2.4
 prompt-toolkit==1.0.13
-protobuf==3.2.0
+protobuf==3.18.3
 ptyprocess==0.5.1
 pyasn1==0.2.3
 pyasn1-modules==0.0.8