diff --git a/requirements.txt b/requirements.txt
index e458623..6c4e367 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -48,7 +48,7 @@ pickleshare==0.7.5
 Pillow==6.2.0
 prometheus-client==0.7.1
 prompt-toolkit==2.0.9
-protobuf==3.6.1
+protobuf==3.15.0
 ptyprocess==0.6.0
 pygame==1.9.6
 Pygments==2.4.2