diff --git a/docs/samples/v1beta1/transformer/feast/driver_transformer.Dockerfile b/docs/samples/v1beta1/transformer/feast/driver_transformer.Dockerfile
index 0136d043ded..bef7a2cbc78 100644
--- a/docs/samples/v1beta1/transformer/feast/driver_transformer.Dockerfile
+++ b/docs/samples/v1beta1/transformer/feast/driver_transformer.Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.9-slim
+FROM python:3.14.0a1-slim
 
 COPY driver_transformer driver_transformer
 WORKDIR driver_transformer