diff --git a/lib/ansible/modules/network/aci/aci_firmware_group.py b/lib/ansible/modules/network/aci/aci_firmware_group.py
index 5aa0d11e6f2..f04c67682e4 100644
--- a/lib/ansible/modules/network/aci/aci_firmware_group.py
+++ b/lib/ansible/modules/network/aci/aci_firmware_group.py
@@ -1,8 +1,9 @@
 #!/usr/bin/python
 
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
 from __future__ import absolute_import, division, print_function
 __metaclass__ = type
-# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
 
 ANSIBLE_METADATA = {
     'metadata_version': '1.1',
@@ -86,7 +87,7 @@ error:
 raw:
   description: The raw output returned by the APIC REST API (xml or json)
   returned: parse error
-  type: string
+  type: str
   sample: '<?xml version="1.0" encoding="UTF-8"?><imdata totalCount="1"><error code="122" text="unknown managed object class foo"/></imdata>'
 sent:
   description: The actual/minimal configuration pushed to the APIC
@@ -135,17 +136,17 @@ proposed:
 filter_string:
   description: The filter string used for the request
   returned: failure or debug
-  type: string
+  type: str
   sample: ?rsp-prop-include=config-only
 method:
   description: The HTTP method used for the request to the APIC
   returned: failure or debug
-  type: string
+  type: str
   sample: POST
 response:
   description: The HTTP response from the APIC
   returned: failure or debug
-  type: string
+  type: str
   sample: OK (30 bytes)
 status:
   description: The HTTP status from the APIC
@@ -155,7 +156,7 @@ status:
 url:
   description: The HTTP url used for the request to the APIC
   returned: failure or debug
-  type: string
+  type: str
   sample: https://10.11.12.13/api/mo/uni/tn-production.json
 '''