diff --git a/requirements.txt b/requirements.txt
index 0596ebf..a5c78c1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -58,7 +58,7 @@ pexpect==4.7.0
 pickleshare==0.7.5
 prometheus-client==0.7.1
 prompt-toolkit==2.0.10
-protobuf==3.11.1
+protobuf==3.15.0
 psycopg2==2.8.3
 ptyprocess==0.6.0
 pyasn1==0.4.8