diff --git a/requirements.txt b/requirements.txt
index b5117d7..7cae3fa 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ librosa>=0.9.2
 mlflow>=2.1.1
 numpy>=1.24.1
 pesq==0.0.4
-protobuf>=4.21.12
+protobuf==3.2.0
 pystoi==0.3.3
 pytest-lazy-fixture>=0.6.3
 pytorch-lightning>=1.7.7