diff --git a/requirements.txt b/requirements.txt
index d169468..89c9ff6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -39,7 +39,7 @@ networkx==2.4
 packaging==20.0
 pathspec==0.7.0
 pluggy==0.13.1
-protobuf==3.11.2
+protobuf==3.15.0
 py==1.8.1
 pyasn1==0.4.8
 pyasn1-modules==0.2.7