diff --git a/requirements.txt b/requirements.txt
index 8b45fa3..bd93870 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ idna==2.7
 isort==4.3.4
 lazy-object-proxy==1.3.1
 mccabe==0.6.1
-protobuf==3.6.1
+protobuf==3.18.3
 pyasn1==0.4.4
 pyasn1-modules==0.2.2
 pylint==2.1.1