diff --git a/app/src/main/res/menu/capture.xml b/app/src/main/res/menu/capture.xml
index 36ece27..d72e330 100644
--- a/app/src/main/res/menu/capture.xml
+++ b/app/src/main/res/menu/capture.xml
@@ -14,25 +14,26 @@
  See the License for the specific language governing permissions and
  limitations under the License.
  -->
-<menu xmlns:android="http://schemas.android.com/apk/res/android">
+<menu xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:android="http://schemas.android.com/apk/res/android">
   <item android:id="@+id/menu_share"
         android:title="@string/menu_share"
         android:icon="@android:drawable/ic_menu_share"
         android:orderInCategory="1"
-        android:showAsAction="withText|ifRoom"/>
+        app:showAsAction="withText|ifRoom" />
   <item android:id="@+id/menu_history"
         android:title="@string/menu_history"
         android:icon="@android:drawable/ic_menu_recent_history"
         android:orderInCategory="2"
-        android:showAsAction="withText|ifRoom"/>
+        app:showAsAction="withText|ifRoom" />
   <item android:id="@+id/menu_settings"
         android:title="@string/menu_settings"
         android:icon="@android:drawable/ic_menu_preferences"
         android:orderInCategory="3"
-        android:showAsAction="withText"/>
+        app:showAsAction="withText" />
   <item android:id="@+id/menu_help"
         android:title="@string/menu_help"
         android:icon="@android:drawable/ic_menu_help"
         android:orderInCategory="4"
-        android:showAsAction="withText"/>
+        app:showAsAction="withText" />
 </menu>
\ No newline at end of file
diff --git a/app/src/main/res/menu/encode.xml b/app/src/main/res/menu/encode.xml
index eb0175b..26d0d99 100644
--- a/app/src/main/res/menu/encode.xml
+++ b/app/src/main/res/menu/encode.xml
@@ -14,15 +14,16 @@
  See the License for the specific language governing permissions and
  limitations under the License.
  -->
-<menu xmlns:android="http://schemas.android.com/apk/res/android">
+<menu xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:android="http://schemas.android.com/apk/res/android">
   <item android:id="@+id/menu_share"
         android:title="@string/menu_share"
         android:icon="@android:drawable/ic_menu_share"
         android:orderInCategory="1"
-        android:showAsAction="withText|ifRoom"/>
+        app:showAsAction="withText|ifRoom" />
   <item android:id="@+id/menu_encode"
         android:title="@string/menu_encode_vcard"
         android:icon="@android:drawable/ic_menu_sort_alphabetically"
         android:orderInCategory="2"
-        android:showAsAction="withText|ifRoom"/>
+        app:showAsAction="withText|ifRoom" />
 </menu>
\ No newline at end of file
diff --git a/app/src/main/res/menu/history.xml b/app/src/main/res/menu/history.xml
index 273802b..d1f3f19 100644
--- a/app/src/main/res/menu/history.xml
+++ b/app/src/main/res/menu/history.xml
@@ -14,15 +14,16 @@
  See the License for the specific language governing permissions and
  limitations under the License.
  -->
-<menu xmlns:android="http://schemas.android.com/apk/res/android">
+<menu xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:android="http://schemas.android.com/apk/res/android">
   <item android:id="@+id/menu_history_send"
         android:title="@string/history_send"
         android:icon="@android:drawable/ic_menu_share"
         android:orderInCategory="1"
-        android:showAsAction="withText|ifRoom"/>
+        app:showAsAction="withText|ifRoom" />
   <item android:id="@+id/menu_history_clear_text"
         android:title="@string/history_clear_text"
         android:icon="@android:drawable/ic_menu_delete"
         android:orderInCategory="2"
-        android:showAsAction="withText|ifRoom"/>
+        app:showAsAction="withText|ifRoom" />
 </menu>
\ No newline at end of file