diff --git a/manifests/backend/multistore/swift.pp b/manifests/backend/multistore/swift.pp
index 920e4f4d..6553011a 100644
--- a/manifests/backend/multistore/swift.pp
+++ b/manifests/backend/multistore/swift.pp
@@ -39,7 +39,7 @@
 #   Optional. Default: $::os_service_default.
 #
 # [*swift_store_auth_version*]
-#   Optional. Default: '2'
+#   Optional. Default: '3'
 #
 # [*swift_store_large_object_size*]
 #   Optional. What size, in MB, should Glance start chunking image files
@@ -94,7 +94,7 @@ define glance::backend::multistore::swift(
   $swift_store_key,
   $swift_store_auth_address            = 'http://127.0.0.1:5000/v3/',
   $swift_store_container               = $::os_service_default,
-  $swift_store_auth_version            = '2',
+  $swift_store_auth_version            = '3',
   $swift_store_auth_project_domain_id  = 'default',
   $swift_store_auth_user_domain_id     = 'default',
   $swift_store_large_object_size       = $::os_service_default,
diff --git a/manifests/backend/swift.pp b/manifests/backend/swift.pp
index c4641aa8..5064ed74 100644
--- a/manifests/backend/swift.pp
+++ b/manifests/backend/swift.pp
@@ -24,7 +24,7 @@
 #    Optional. Default: $::os_service_default.
 #
 #  [*swift_store_auth_version*]
-#    Optional. Default: '2'
+#    Optional. Default: '3'
 #
 #  [*swift_store_large_object_size*]
 #    Optional. What size, in MB, should Glance start chunking image files
@@ -61,7 +61,7 @@ class glance::backend::swift(
   $swift_store_key,
   $swift_store_auth_address            = 'http://127.0.0.1:5000/v3/',
   $swift_store_container               = $::os_service_default,
-  $swift_store_auth_version            = '2',
+  $swift_store_auth_version            = '3',
   $swift_store_auth_project_domain_id  = 'default',
   $swift_store_auth_user_domain_id     = 'default',
   $swift_store_large_object_size       = $::os_service_default,
diff --git a/releasenotes/notes/bug-1947816-75538e8fd13e59c6.yaml b/releasenotes/notes/bug-1947816-75538e8fd13e59c6.yaml
new file mode 100644
index 00000000..c22a3a35
--- /dev/null
+++ b/releasenotes/notes/bug-1947816-75538e8fd13e59c6.yaml
@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    `Bug #1947816 <https://bugs.launchpad.net/puppet-glance/+bug/1947816>`_:
+    Fix the default auth_version for swift backend so that Keystone v3 API is
+    used by default instead of v2 API.
diff --git a/spec/classes/glance_backend_swift_spec.rb b/spec/classes/glance_backend_swift_spec.rb
index 989f64ea..b1a079ed 100644
--- a/spec/classes/glance_backend_swift_spec.rb
+++ b/spec/classes/glance_backend_swift_spec.rb
@@ -30,7 +30,7 @@ describe 'glance::backend::swift' do
         is_expected.to contain_glance_api_config('glance_store/default_swift_reference').with_value('ref1')
         is_expected.to contain_glance_swift_config('ref1/key').with_value('key')
         is_expected.to contain_glance_swift_config('ref1/user').with_value('user')
-        is_expected.to contain_glance_swift_config('ref1/auth_version').with_value('2')
+        is_expected.to contain_glance_swift_config('ref1/auth_version').with_value('3')
         is_expected.to contain_glance_swift_config('ref1/auth_address').with_value('http://127.0.0.1:5000/v3/')
         is_expected.to contain_glance_swift_config('ref1/user_domain_id').with_value('default')
         is_expected.to contain_glance_swift_config('ref1/project_domain_id').with_value('default')
diff --git a/spec/defines/glance_backend_multistore_swift_spec.rb b/spec/defines/glance_backend_multistore_swift_spec.rb
index ce05ab2c..c1b3a41f 100644
--- a/spec/defines/glance_backend_multistore_swift_spec.rb
+++ b/spec/defines/glance_backend_multistore_swift_spec.rb
@@ -53,7 +53,7 @@ describe 'glance::backend::multistore::swift' do
         is_expected.to contain_glance_api_config('swift/swift_upload_buffer_dir').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_glance_swift_config('ref1/key').with_value('key').with_secret(true)
         is_expected.to contain_glance_swift_config('ref1/user').with_value('user')
-        is_expected.to contain_glance_swift_config('ref1/auth_version').with_value('2')
+        is_expected.to contain_glance_swift_config('ref1/auth_version').with_value('3')
         is_expected.to contain_glance_swift_config('ref1/auth_address').with_value('http://127.0.0.1:5000/v3/')
         is_expected.to contain_glance_swift_config('ref1/user_domain_id').with_value('default')
         is_expected.to contain_glance_swift_config('ref1/project_domain_id').with_value('default')