diff --git a/requirements.txt b/requirements.txt
index 4727a21..b3255a5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -58,7 +58,7 @@ parso==0.5.2
 pickleshare==0.7.5
 prometheus-client==0.7.1
 prompt-toolkit==3.0.2
-protobuf==3.11.2
+protobuf==3.15.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.7
 pycodestyle==2.5.0