diff --git a/requirements.txt b/requirements.txt
index 2a4c84e..a9e4cdf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 defusedxml==0.7.1
-protobuf==3.20.1
+protobuf==4.21.0
 pycryptodomex==3.14.1
 pyogg==0.6.14a.1
 requests==2.27.1