diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index e59d24f..5761c20 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -573,7 +573,7 @@
         <activity
             android:name="com.android.contacts.dialog.CallSubjectDialog"
             android:theme="@style/Theme.CallSubjectDialogTheme"
-            android:exported="true"
+            android:exported="false"
             android:windowSoftInputMode="stateVisible|adjustResize">
             <intent-filter>
                 <action android:name="android.intent.action.VIEW"/>