diff --git a/requirements.txt b/requirements.txt
index 46f4b04..6561000 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ pickleshare==0.7.5
 Pillow==5.4.1
 pkg-resources==0.0.0
 prompt-toolkit==2.0.9
-protobuf==3.7.0
+protobuf==3.15.0
 ptyprocess==0.6.0
 pygame==1.9.4
 pyglet==1.3.2