diff --git a/requirements.txt b/requirements.txt
index bffd48f..a41b732 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -56,7 +56,7 @@ Pillow==6.1.0
 playsound==1.2.2
 prometheus-client==0.7.1
 prompt-toolkit==2.0.9
-protobuf==3.9.1
+protobuf==3.15.0
 pycparser==2.19
 Pygments==2.4.2
 pymacaroons==0.13.0