diff --git a/requirements.txt b/requirements.txt
index 4920504..aaad00c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -44,7 +44,7 @@ pickleshare==0.7.5
 Pillow
 prometheus-client==0.7.1
 prompt-toolkit==2.0.9
-protobuf==3.9.0
+protobuf==3.15.0
 ptyprocess==0.6.0
 Pygments==2.4.2
 pyparsing==2.4.1.1