diff --git a/requirement.txt b/requirement.txt
index e55e27f..358437e 100644
--- a/requirement.txt
+++ b/requirement.txt
@@ -51,7 +51,7 @@ pexpect==4.6.0
 pickleshare==0.7.4
 prometheus-client==0.3.1
 prompt-toolkit==1.0.15
-protobuf==3.6.0
+protobuf==3.18.3
 ptyprocess==0.6.0
 Pygments==2.2.0
 pylint==1.9.3