diff --git a/quizzer.kv b/quizzer.kv
index b022abd170cea7aedda653f8d9902fac95e46e96..e86ac9d5ee0af47b387777d8f28c227a1335aec8 100644
--- a/quizzer.kv
+++ b/quizzer.kv
@@ -27,7 +27,7 @@ ScreenManager:
                 Widget:
                 CheckBox:
                     id: color
-                    group: 'categories'
+                    group: 'categoriess'
                     active: False
                     size_hint: (None, None)
                     size: (sp(32), color_label.height)
@@ -43,7 +43,7 @@ ScreenManager:
                 Widget:
                 CheckBox:
                     id: tree
-                    group: 'categories'
+                    group: 'categoriese'
                     active: False
                     size_hint: (None, None)
                     size: (sp(32), tree_label.height)