diff --git a/requirements.txt b/requirements.txt
index ac6dca2..d464080 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -66,7 +66,7 @@ pexpect==4.6.0
 pickleshare==0.7.4
 prometheus-client==0.4.1
 prompt-toolkit==1.0.15
-protobuf==3.6.1
+protobuf==3.15.0
 ptyprocess==0.6.0
 pyasn1==0.4.4
 pyasn1-modules==0.2.2