diff --git a/src/frontends/android/app/src/main/java/org/strongswan/android/logic/CharonVpnService.java b/src/frontends/android/app/src/main/java/org/strongswan/android/logic/CharonVpnService.java
index 3e4305845..5cf2fe5d3 100644
--- a/src/frontends/android/app/src/main/java/org/strongswan/android/logic/CharonVpnService.java
+++ b/src/frontends/android/app/src/main/java/org/strongswan/android/logic/CharonVpnService.java
@@ -35,7 +35,6 @@ import android.os.Bundle;
 import android.os.Handler;
 import android.os.IBinder;
 import android.os.ParcelFileDescriptor;
-import android.preference.PreferenceManager;
 import android.security.KeyChain;
 import android.security.KeyChainException;
 import android.system.OsConstants;
@@ -77,6 +76,7 @@ import java.util.SortedSet;
 
 import androidx.core.app.NotificationCompat;
 import androidx.core.content.ContextCompat;
+import androidx.preference.PreferenceManager;
 
 public class CharonVpnService extends VpnService implements Runnable, VpnStateService.VpnStateListener
 {
diff --git a/src/frontends/android/app/src/main/java/org/strongswan/android/ui/VpnTileService.java b/src/frontends/android/app/src/main/java/org/strongswan/android/ui/VpnTileService.java
index 6016ebfbb..df3c666f0 100644
--- a/src/frontends/android/app/src/main/java/org/strongswan/android/ui/VpnTileService.java
+++ b/src/frontends/android/app/src/main/java/org/strongswan/android/ui/VpnTileService.java
@@ -25,7 +25,6 @@ import android.content.SharedPreferences;
 import android.graphics.drawable.Icon;
 import android.os.Build;
 import android.os.IBinder;
-import android.preference.PreferenceManager;
 import android.service.quicksettings.Tile;
 import android.service.quicksettings.TileService;
 
@@ -36,6 +35,8 @@ import org.strongswan.android.data.VpnType;
 import org.strongswan.android.logic.VpnStateService;
 import org.strongswan.android.utils.Constants;
 
+import androidx.preference.PreferenceManager;
+
 @TargetApi(Build.VERSION_CODES.N)
 public class VpnTileService extends TileService implements VpnStateService.VpnStateListener
 {