diff --git a/res/layout/enable_accessibility_service_dialog_content.xml b/res/layout/enable_accessibility_service_dialog_content.xml
index 3fe932c..0286d57 100644
--- a/res/layout/enable_accessibility_service_dialog_content.xml
+++ b/res/layout/enable_accessibility_service_dialog_content.xml
@@ -23,7 +23,6 @@
     android:gravity="top">
 
     <LinearLayout
-        android:theme="@style/Theme.AlertDialog"
         style="@style/AccessibilityDialog">
 
         <LinearLayout
diff --git a/res/layout/tutorial_dialog_launch_by_gesture_navigation_settings.xml b/res/layout/tutorial_dialog_launch_by_gesture_navigation_settings.xml
index b494e93..86c6b3a 100644
--- a/res/layout/tutorial_dialog_launch_by_gesture_navigation_settings.xml
+++ b/res/layout/tutorial_dialog_launch_by_gesture_navigation_settings.xml
@@ -23,7 +23,6 @@
     android:scrollbarStyle="outsideOverlay">
 
     <LinearLayout
-        android:theme="@style/Theme.AlertDialog"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:orientation="vertical"
diff --git a/res/layout/tutorial_dialog_launch_service_by_accessibility_button.xml b/res/layout/tutorial_dialog_launch_service_by_accessibility_button.xml
index ecbccab..117db7d 100644
--- a/res/layout/tutorial_dialog_launch_service_by_accessibility_button.xml
+++ b/res/layout/tutorial_dialog_launch_service_by_accessibility_button.xml
@@ -23,7 +23,6 @@
     android:scrollbarStyle="outsideOverlay">
 
     <LinearLayout
-        android:theme="@style/Theme.AlertDialog"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:orientation="vertical"
diff --git a/res/layout/tutorial_dialog_launch_service_by_gesture_navigation.xml b/res/layout/tutorial_dialog_launch_service_by_gesture_navigation.xml
index 2557737..340c738 100644
--- a/res/layout/tutorial_dialog_launch_service_by_gesture_navigation.xml
+++ b/res/layout/tutorial_dialog_launch_service_by_gesture_navigation.xml
@@ -23,7 +23,6 @@
     android:scrollbarStyle="outsideOverlay">
 
     <LinearLayout
-        android:theme="@style/Theme.AlertDialog"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:orientation="vertical"