diff --git a/xwords4/android/app/src/main/AndroidManifest.xml b/xwords4/android/app/src/main/AndroidManifest.xml
index 4a2c9dfb8..6b6b79d20 100644
--- a/xwords4/android/app/src/main/AndroidManifest.xml
+++ b/xwords4/android/app/src/main/AndroidManifest.xml
@@ -58,6 +58,7 @@
     <activity android:name="MainActivity"
               android:label="@string/app_name"
               android:launchMode="singleTask"
+              android:exported="true"
               >
       <intent-filter>
         <action android:name="android.intent.action.MAIN" />
@@ -108,11 +109,12 @@
     <activity android:name="PrefsActivity"
               android:label="@string/title_prefs"
               android:screenOrientation="sensor"
-               android:theme="@style/Theme.AppCompat"
+              android:theme="@style/Theme.AppCompat"
               />
 
-
-    <receiver android:name="OnBootReceiver">
+    <receiver android:name="OnBootReceiver"
+              android:exported="true"
+              >
       <intent-filter>
         <action android:name="android.intent.action.BOOT_COMPLETED"/>
         <action android:name="android.intent.action.MY_PACKAGE_REPLACED" />
@@ -121,7 +123,9 @@
     <receiver android:name="TimerReceiver"/>
     <receiver android:name="DupeModeTimer"/>
 
-    <receiver android:name="UpdateCheckReceiver">
+    <receiver android:name="UpdateCheckReceiver"
+              android:exported="true"
+              >
       <intent-filter>
         <action android:name="android.intent.action.BOOT_COMPLETED"/>
       </intent-filter>
@@ -131,6 +135,7 @@
     <activity android:name=".DwnldActivity"
               android:label="@string/app_name"
               android:theme="@android:style/Theme.Dialog"
+              android:exported="true"
               >
       <intent-filter>
         <action android:name="android.intent.action.VIEW"></action>
@@ -152,7 +157,9 @@
     <activity android:name=".loc.LocItemEditActivity"
               />
 
-    <receiver android:name=".MountEventReceiver">
+    <receiver android:name=".MountEventReceiver"
+              android:exported="true"
+              >
         <intent-filter>
             <action android:name="android.intent.action.MEDIA_MOUNTED" />
             <data android:scheme="file" />
@@ -164,7 +171,8 @@
     </receiver>
 
     <service android:name="NFCCardService" android:exported="true"
-             android:permission="android.permission.BIND_NFC_SERVICE">
+             android:permission="android.permission.BIND_NFC_SERVICE"
+             >
       <intent-filter>
         <action android:name="android.nfc.cardemulation.action.HOST_APDU_SERVICE"/>
       </intent-filter>