diff --git a/requirement.txt b/requirement.txt
index 722d11a..165f2fe 100644
--- a/requirement.txt
+++ b/requirement.txt
@@ -43,7 +43,7 @@ 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
 pyasn1==0.4.4
 pyasn1-modules==0.2.2