diff --git a/DroidCafeInput/app/src/main/res/layout/activity_order.xml b/DroidCafeInput/app/src/main/res/layout/activity_order.xml
index 54dd2030..8c21d9d1 100644
--- a/DroidCafeInput/app/src/main/res/layout/activity_order.xml
+++ b/DroidCafeInput/app/src/main/res/layout/activity_order.xml
@@ -15,7 +15,7 @@
   ~ limitations under the License.
   -->
 
-<android.support.constraint.ConstraintLayout
+<androidx.constraintlayout.widget.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"
@@ -184,4 +184,4 @@
         app:layout_constraintStart_toEndOf="@+id/phone_text"
         app:layout_constraintTop_toBottomOf="@+id/address_text" />
 
-</android.support.constraint.ConstraintLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>