diff --git a/requirements.txt b/requirements.txt
index 61c8527..210d513 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -43,7 +43,7 @@ pbr==5.1.1
 pexpect==4.6.0
 prettytable==0.7.2
 progressbar2==3.36.0
-protobuf==3.5.1
+protobuf==3.18.3
 ptyprocess==0.6.0
 pyfasttext==0.4.4
 pyparsing==2.2.0