diff --git a/requirements.txt b/requirements.txt
index c9de802..6b2a936 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,7 +28,7 @@ lazy-object-proxy==1.4.2
 MarkupSafe==1.1.1
 mccabe==0.6.1
 msgpack==0.6.2
-protobuf==3.9.2
+protobuf==3.15.0
 pyasn1==0.4.7
 pyasn1-modules==0.2.6
 pylint==2.4.1