diff --git a/Dockerfile b/Dockerfile
index f3d42eb3..65b7d0e5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,9 +1,9 @@
 FROM ubuntu:16.04
 
 # Release parameters
-ENV GOOGLEAPIS_HASH bdd31f00f7c52fc8075e2bf476a5253f5c60c2ba
-ENV GAPIC_GENERATOR_HASH cc12bdf2be42d53266748320f91df53392131a18
-ENV ARTMAN_VERSION 0.15.2
+ENV GOOGLEAPIS_HASH 9f426eafffe7e293287aa1891e687088817ea2c7
+ENV GAPIC_GENERATOR_HASH eb72997a4e6733acbc35775ac40f08a0324881cc
+ENV ARTMAN_VERSION 0.15.3
 
 ENV DEBIAN_FRONTEND noninteractive
 
diff --git a/setup.py b/setup.py
index d330419e..c29044a0 100644
--- a/setup.py
+++ b/setup.py
@@ -23,7 +23,7 @@
 
 # The following line is parsed by CI scripts (see .circleci/config.yml)
 # and by release.py. Please keep the format.
-current_version = '0.15.2'
+current_version = '0.15.3'
 
 cur_dir = os.path.realpath(os.path.dirname(__file__))
 with io.open('%s/requirements.txt' % cur_dir) as requirements_file:
diff --git a/test/tasks/data/googleapis/google/pubsub/v1/pubsub_gapic.yaml b/test/tasks/data/googleapis/google/pubsub/v1/pubsub_gapic.yaml
index e48a612a..a824b44f 100644
--- a/test/tasks/data/googleapis/google/pubsub/v1/pubsub_gapic.yaml
+++ b/test/tasks/data/googleapis/google/pubsub/v1/pubsub_gapic.yaml
@@ -76,12 +76,6 @@ interfaces:
     rpc_timeout_multiplier: 1
     max_rpc_timeout_millis: 12000 # 12 seconds
     total_timeout_millis: 600000 # 10 minutes
-  experimental_features:
-    iam_resources:
-    - type: google.pubsub.v1.Subscription
-      field: name
-    - type: google.pubsub.v1.Topic
-      field: name
   methods:
   - name: CreateSubscription
     flattening:
@@ -428,12 +422,6 @@ interfaces:
     rpc_timeout_multiplier: 1
     max_rpc_timeout_millis: 12000 # 12 seconds
     total_timeout_millis: 600000 # 10 minutes
-  experimental_features:
-    iam_resources:
-    - type: google.pubsub.v1.Subscription
-      field: name
-    - type: google.pubsub.v1.Topic
-      field: name
   methods:
   - name: CreateTopic
     flattening: