diff --git a/installer/roles/local_docker/tasks/standalone.yml b/installer/roles/local_docker/tasks/standalone.yml
index 1640a11574..900926fa01 100644
--- a/installer/roles/local_docker/tasks/standalone.yml
+++ b/installer/roles/local_docker/tasks/standalone.yml
@@ -80,11 +80,9 @@
     state: started
     restart_policy: unless-stopped
     image: "{{ awx_web_docker_actual_image }}"
-    volumes: >
-      {{
-        [project_data_dir + ':/var/lib/awx/projects:rw'] if project_data_dir is defined else []
-        + [ca_trust_dir + ':/etc/pki/ca-trust/source/anchors:ro'] if ca_trust_dir is defined else []
-      }}
+    volumes:
+      - "{{ project_data_dir + ':/var/lib/awx/projects:rw' if project_data_dir is defined else [] }}"
+      - "{{ ca_trust_dir + ':/etc/pki/ca-trust/source/anchors:ro' if ca_trust_dir is defined else [] }}"
     user: root
     ports:
       - "{{ host_port }}:8052"
@@ -111,6 +109,11 @@
       MEMCACHED_PORT: "11211"
       AWX_ADMIN_USER: "{{ default_admin_user|default('admin') }}"
       AWX_ADMIN_PASSWORD: "{{ default_admin_password|default('password') }}"
+    register: awx_web_container
+
+- name: Update CA trust in awx_web container
+  command: docker exec awx_web '/usr/bin/update-ca-trust'
+  when: awx_web_container.changed
 
 - name: Activate AWX Task Container
   docker_container: