diff --git a/Corona-Warn-App/src/main/res/values/styles.xml b/Corona-Warn-App/src/main/res/values/styles.xml
index 849496f7fec98b9b1b59b3416dc094bd3dfd4800..82bb129f434699ec40879e672ad54485e2111876 100644
--- a/Corona-Warn-App/src/main/res/values/styles.xml
+++ b/Corona-Warn-App/src/main/res/values/styles.xml
@@ -9,6 +9,8 @@
 
         <item name="materialCalendarTheme">@style/ThemeOverlay.App.DatePicker</item>
         <item name="materialTimePickerTheme">@style/ThemeOverlay.App.TimePicker</item>
+
+        <item name="buttonStyle">@style/Widget.AppCompat.Button.Borderless.Colored</item>
     </style>
 
     <style name="ThemeOverlay.App.DatePicker" parent="ThemeOverlay.MaterialComponents.MaterialCalendar">