diff --git a/requirements.txt b/requirements.txt
index 3816b66..1eb9ca3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -60,7 +60,7 @@ pexpect==4.6.0
 pickleshare==0.7.4
 prometheus-client==0.3.1
 prompt-toolkit==1.0.15
-protobuf==3.6.1
+protobuf==3.18.3
 psutil==5.4.7
 ptyprocess==0.6.0
 pycodestyle==2.4.0