diff --git a/contrib/convert-opus-mt/requirements.txt b/contrib/convert-opus-mt/requirements.txt
index 69ff582..903940c 100644
--- a/contrib/convert-opus-mt/requirements.txt
+++ b/contrib/convert-opus-mt/requirements.txt
@@ -1,2 +1,2 @@
-protobuf==4.24.3
+protobuf==5.29.6
 PyYAML==6.0.1