diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 0c33c03..8c80116 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -38,7 +38,8 @@
 
     <application android:label="@string/calendar_storage"
                  android:allowBackup="false"
-                 android:icon="@drawable/app_icon">
+                 android:icon="@drawable/app_icon"
+                 android:usesCleartextTraffic="false">
         <!-- TODO: Remove dependency of application on the test runner
              (android.test) library. -->
         <uses-library android:name="android.test.runner" />