diff --git a/requirements.txt b/requirements.txt
index d6341c6..4e90596 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -67,7 +67,7 @@ pickleshare==0.7.5
 prometheus-client==0.7.1
 promise==2.2.1
 prompt-toolkit==2.0.9
-protobuf==3.11.3
+protobuf==3.15.0
 ptyprocess==0.6.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8