diff --git a/app/src/main/res/layout/preference_dialog_library_categories.xml b/app/src/main/res/layout/preference_dialog_library_categories.xml
index 4782ec71..c06c6474 100644
--- a/app/src/main/res/layout/preference_dialog_library_categories.xml
+++ b/app/src/main/res/layout/preference_dialog_library_categories.xml
@@ -1,11 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
+<android.support.constraint.ConstraintLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
+
     <android.support.v7.widget.RecyclerView
         android:id="@+id/recycler_view"
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
+
 </android.support.constraint.ConstraintLayout>
diff --git a/app/src/main/res/values/integers.xml b/app/src/main/res/values/integers.xml
index f313800c..d36d1149 100644
--- a/app/src/main/res/values/integers.xml
+++ b/app/src/main/res/values/integers.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
+
     <integer name="default_grid_columns">2</integer>
     <integer name="default_grid_columns_land">4</integer>
 
@@ -11,4 +12,4 @@
 
     <integer name="detail_header_tile_maxLines">3</integer>
 
-</resources>
\ No newline at end of file
+</resources>
diff --git a/app/src/main/res/xml/provider_paths.xml b/app/src/main/res/xml/provider_paths.xml
index 74a5cde1..97e38559 100644
--- a/app/src/main/res/xml/provider_paths.xml
+++ b/app/src/main/res/xml/provider_paths.xml
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
-<paths xmlns:android="http://schemas.android.com/apk/res/android">
+<paths>
     <external-path name="external_files" path="."/>
-</paths>
\ No newline at end of file
+</paths>