diff --git a/requirements.txt b/requirements.txt
index 2318d92..f853d2c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,7 +26,7 @@ pep8==1.7.1
 pexpect==4.7.0
 pickleshare==0.7.5
 prompt-toolkit==2.0.9
-protobuf==3.8.0
+protobuf==3.18.3
 ptyprocess==0.6.0
 pyasn1==0.4.5
 pyasn1-modules==0.2.5