diff --git a/apps/rgb_colourspace_chromatically_adapted_primaries.py b/apps/rgb_colourspace_chromatically_adapted_primaries.py
index 91e6750..6a24223 100644
--- a/apps/rgb_colourspace_chromatically_adapted_primaries.py
+++ b/apps/rgb_colourspace_chromatically_adapted_primaries.py
@@ -205,7 +205,7 @@ def _uid(id_):
         ),
         Div(className="col-2"),
     ],
-    Div(className="row"),
+    className="row",
 )
 """
 App layout, i.e. :class:`Div` class instance.
diff --git a/apps/rgb_colourspace_transformation_matrix.py b/apps/rgb_colourspace_transformation_matrix.py
index ef50404..ca5636a 100644
--- a/apps/rgb_colourspace_transformation_matrix.py
+++ b/apps/rgb_colourspace_transformation_matrix.py
@@ -217,7 +217,7 @@ def _uid(id_):
         ),
         Div(className="col-2"),
     ],
-    Div(className="row"),
+    className="row",
 )
 """
 App layout, i.e. :class:`Div` class instance.