diff --git a/requirements.txt b/requirements.txt
index 79829fe..aef4b53 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -45,7 +45,7 @@ pexpect==4.7.0
 pickleshare==0.7.5
 prometheus-client==0.7.1
 prompt-toolkit==2.0.9
-protobuf==3.9.1
+protobuf==3.18.3
 ptyprocess==0.6.0
 Pygments==2.4.2
 pyparsing==2.4.2