diff --git a/runners/google-cloud-dataflow-java/build.gradle b/runners/google-cloud-dataflow-java/build.gradle
index 9b32c482afac..b513b1aa207b 100644
--- a/runners/google-cloud-dataflow-java/build.gradle
+++ b/runners/google-cloud-dataflow-java/build.gradle
@@ -52,8 +52,8 @@ evaluationDependsOn(":sdks:java:container:java11")
 
 ext.dataflowLegacyEnvironmentMajorVersion = '8'
 ext.dataflowFnapiEnvironmentMajorVersion = '8'
-ext.dataflowLegacyContainerVersion = 'beam-master-20260731'
-ext.dataflowFnapiContainerVersion = 'beam-master-20260731'
+ext.dataflowLegacyContainerVersion = 'beam-master-20260911'
+ext.dataflowFnapiContainerVersion = 'beam-master-20260909'
 ext.dataflowContainerBaseRepository = 'gcr.io/cloud-dataflow/v1beta3'
 
 processResources {
diff --git a/sdks/python/apache_beam/runners/dataflow/internal/names.py b/sdks/python/apache_beam/runners/dataflow/internal/names.py
index 473e2a7a1450..0cd6de4147eb 100644
--- a/sdks/python/apache_beam/runners/dataflow/internal/names.py
+++ b/sdks/python/apache_beam/runners/dataflow/internal/names.py
@@ -35,6 +35,6 @@
 # Update this tag whenever there is a change that
 # requires changes to SDK harness container or SDK harness launcher.
 
-BEAM_DEV_SDK_CONTAINER_TAG = 'beam-master-20260831'
+BEAM_DEV_SDK_CONTAINER_TAG = 'beam-master-20260909'
 
 DATAFLOW_CONTAINER_IMAGE_REPOSITORY = 'gcr.io/cloud-dataflow/v1beta3'