diff --git a/openlp/core/api/versions/v2/core.py b/openlp/core/api/versions/v2/core.py
index 60e424ed4..b783b439a 100644
--- a/openlp/core/api/versions/v2/core.py
+++ b/openlp/core/api/versions/v2/core.py
@@ -60,7 +60,7 @@ def system_information():
     data['websocket_port'] = Registry().get('settings_thread').value('api/websocket port')
     data['login_required'] = Registry().get('settings_thread').value('api/authentication enabled')
     data['api_version'] = 2
-    data['api_revision'] = 2
+    data['api_revision'] = 3
     return jsonify(data)
 
 
diff --git a/openlp/core/api/versions/v2/plugins.py b/openlp/core/api/versions/v2/plugins.py
index 039f5b547..36ea5d89a 100644
--- a/openlp/core/api/versions/v2/plugins.py
+++ b/openlp/core/api/versions/v2/plugins.py
@@ -182,6 +182,7 @@ def transpose(transpose_value):
                 chord_slides.append({'chords': verse_list[i + 1].strip(), 'verse': verse_list[i]})
         if return_service_item:
             live_item['chords_transposed'] = True
+            live_item['slides'][live_controller.selected_row]['selected'] = True
             json_live_item = json.dumps(live_item, cls=OpenLPJSONEncoder)
             return Response(json_live_item, mimetype='application/json')
         else:
diff --git a/tests/openlp_core/api/v2/test_plugins.py b/tests/openlp_core/api/v2/test_plugins.py
index 2d911c57a..b2fdf3af9 100644
--- a/tests/openlp_core/api/v2/test_plugins.py
+++ b/tests/openlp_core/api/v2/test_plugins.py
@@ -103,7 +103,7 @@ def test_plugin_songs_transpose_returns_plugin_exception(flask_client, settings)
     assert res.status_code == 400
 
 
-TransposeMockReturn = namedtuple('TransposeMockReturn', ['renderer_mock_any_attr'])
+TransposeMockReturn = namedtuple('TransposeMockReturn', ['renderer_mock_any_attr', 'live_controller_mock'])
 
 
 def _init_transpose_mocks():
@@ -136,7 +136,8 @@ def _init_transpose_mocks():
     renderer_mock_any_attr.reset_mock()
     renderer_mock.format_slides.reset_mock()
 
-    return TransposeMockReturn(renderer_mock_any_attr=renderer_mock_any_attr)
+    return TransposeMockReturn(renderer_mock_any_attr=renderer_mock_any_attr,
+                               live_controller_mock=live_controller_mock)
 
 
 def test_plugin_songs_transpose_wont_call_renderer(flask_client, settings):
@@ -171,3 +172,20 @@ def test_plugin_songs_transpose_accepts_response_format_service_item(flask_clien
     # THEN: The service item response shouldn't match normal response and should be a service_item response
     response = service_item_res.json
     assert 'capabilities' in response
+
+
+def test_plugin_songs_transpose_marks_selected_slide(flask_client, settings):
+    """
+    Tests whether the transpose's endpoint marks the active slide
+    """
+
+    # GIVEN: The default mocks for Transpose API and the default response
+    mocks = _init_transpose_mocks()
+    mocks.live_controller_mock.selected_row = 1
+
+    # WHEN: The transpose action returning service_item is called
+    service_item_res = flask_client.get('/api/v2/plugins/songs/transpose-live-item/-1?response_format=service_item')
+
+    # THEN: The service item response shouldn't match normal response and should be a service_item response
+    response = service_item_res.json
+    assert response['slides'][1]['selected'] is True