diff --git a/requirements.txt b/requirements.txt
index d028f82..91e33ce 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ idna==2.7
 isort==4.3.4
 lazy-object-proxy==1.3.1
 mccabe==0.6.1
-protobuf==3.6.1
+protobuf==3.15.8
 pyasn1-modules==0.2.2
 pyasn1==0.4.4
 pylint==2.1.1