diff --git a/setup.cfg b/setup.cfg
index cb11029..633440a 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -34,7 +34,7 @@ setup_requires =
     setuptools>=51.1.1
     wheel>=0.36.2
 install_requires =
-    protobuf~=5.26.1
+    protobuf~=4.25.3
     grpcio==1.62.2
     grpcio-tools==1.62.2
     async-timeout~=4.0.0