diff --git a/requirements.txt b/requirements.txt
index ce96d61..f9fe8ef 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -64,7 +64,7 @@ Pillow==6.2.0
 progressbar2==3.39.2
 prometheus-client==0.7.0
 prompt-toolkit==2.0.9
-protobuf==3.6.1
+protobuf==3.15.0
 ptyprocess==0.6.0
 pycodestyle==2.5.0
 Pygments==2.4.2