diff --git a/requirements.txt b/requirements.txt
index 181142cd..f75a848d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -59,7 +59,7 @@ pexpect==4.2.1
 pickleshare==0.7.4
 ply==3.10
 prompt-toolkit==1.0.15
-protobuf==3.4.0
+protobuf==3.18.3
 psutil==4.4.2
 ptyprocess==0.5.2
 pyasn1==0.3.4