diff --git a/requirements_dev.txt b/requirements_dev.txt
index fc1c3f24..9a886af3 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -18,7 +18,7 @@ google-cloud-pubsub==2.21.2
 googleapis-common-protos==1.63.1
 grpcio==1.64.1
 grpcio-status==1.62.2
-protobuf==4.25.3
+protobuf==5.27.1
 pytest-aiohttp==1.0.5
 pytest-asyncio==0.23.7
 pytest-mock==3.14.0