diff --git a/requirements.txt b/requirements.txt
index b7c111f..9cd74e7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,7 +40,7 @@ pexpect==4.6.0
 pickleshare==0.7.5
 Pillow==6.2.0
 prompt-toolkit==1.0.15
-protobuf==3.6.1
+protobuf==3.18.3
 ptyprocess==0.6.0
 Pygments==2.2.0
 pyparsing==2.3.0