diff --git a/requirements.txt b/requirements.txt
index 783c213..785f1db 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ ordered-set==3.1.1
 Pillow==5.4.1
 pkg-resources==0.0.0
 portpicker==1.3.1
-protobuf==3.11.3
+protobuf==3.18.3
 pygame==1.9.6
 pyglet==1.4.6
 pylint==2.4.4