diff --git a/skyramp/k8s/grpc-demo/sample-clients/local/python/requirements.txt b/skyramp/k8s/grpc-demo/sample-clients/local/python/requirements.txt
index 30abb59..da56a21 100644
--- a/skyramp/k8s/grpc-demo/sample-clients/local/python/requirements.txt
+++ b/skyramp/k8s/grpc-demo/sample-clients/local/python/requirements.txt
@@ -4,4 +4,4 @@ h2==4.3.0
 hpack==4.1.0
 hyperframe==6.1
 multidict==6.0.2
-protobuf==4.25.8
+protobuf==5.29.6
diff --git a/src/clients/requirements.txt b/src/clients/requirements.txt
index dacf012..05b40d3 100644
--- a/src/clients/requirements.txt
+++ b/src/clients/requirements.txt
@@ -4,5 +4,5 @@ h2==4.3.0
 hpack==4.0.0
 hyperframe==6.0.1
 multidict==6.0.2
-protobuf==4.25.8
+protobuf==5.29.6
 thrift==0.16.0