diff --git a/src/main/java/eu/siacs/conversations/ui/AboutActivity.java b/src/main/java/eu/siacs/conversations/ui/AboutActivity.java
index f79a65597..917512a02 100644
--- a/src/main/java/eu/siacs/conversations/ui/AboutActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/AboutActivity.java
@@ -1,7 +1,6 @@
 package eu.siacs.conversations.ui;
 
 import android.os.Bundle;
-import android.preference.PreferenceManager;
 
 import androidx.appcompat.app.AppCompatActivity;
 
diff --git a/src/main/java/eu/siacs/conversations/ui/ConversationActivity.java b/src/main/java/eu/siacs/conversations/ui/ConversationActivity.java
index 04361a5da..2d9fe91ae 100644
--- a/src/main/java/eu/siacs/conversations/ui/ConversationActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/ConversationActivity.java
@@ -2,7 +2,6 @@ package eu.siacs.conversations.ui;
 
 import android.content.Intent;
 import android.os.Bundle;
-import android.preference.PreferenceManager;
 
 import androidx.annotation.Nullable;
 import androidx.appcompat.app.AppCompatActivity;
diff --git a/src/main/java/eu/siacs/conversations/ui/MemorizingActivity.java b/src/main/java/eu/siacs/conversations/ui/MemorizingActivity.java
index 123f57fbb..23f3c82d8 100644
--- a/src/main/java/eu/siacs/conversations/ui/MemorizingActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/MemorizingActivity.java
@@ -29,7 +29,6 @@ import android.content.DialogInterface.OnCancelListener;
 import android.content.DialogInterface.OnClickListener;
 import android.content.Intent;
 import android.os.Bundle;
-import android.preference.PreferenceManager;
 
 import androidx.appcompat.app.AlertDialog;
 import androidx.appcompat.app.AppCompatActivity;
diff --git a/src/main/java/eu/siacs/conversations/ui/RecordingActivity.java b/src/main/java/eu/siacs/conversations/ui/RecordingActivity.java
index aa4e15c06..6146c4ae7 100644
--- a/src/main/java/eu/siacs/conversations/ui/RecordingActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/RecordingActivity.java
@@ -9,7 +9,6 @@ import android.os.Bundle;
 import android.os.FileObserver;
 import android.os.Handler;
 import android.os.SystemClock;
-import android.preference.PreferenceManager;
 import android.util.Log;
 import android.view.View;
 import android.view.WindowManager;
diff --git a/src/main/java/eu/siacs/conversations/ui/ScanActivity.java b/src/main/java/eu/siacs/conversations/ui/ScanActivity.java
index 3e7eddc64..95505647d 100644
--- a/src/main/java/eu/siacs/conversations/ui/ScanActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/ScanActivity.java
@@ -33,7 +33,6 @@ import android.os.Handler;
 import android.os.HandlerThread;
 import android.os.Process;
 import android.os.Vibrator;
-import android.preference.PreferenceManager;
 import android.util.Log;
 import android.view.KeyEvent;
 import android.view.Surface;
@@ -61,8 +60,8 @@ import java.util.Map;
 import eu.siacs.conversations.Config;
 import eu.siacs.conversations.R;
 import eu.siacs.conversations.ui.service.CameraManager;
-import eu.siacs.conversations.ui.widget.ScannerView;
 import eu.siacs.conversations.ui.util.SettingsUtils;
+import eu.siacs.conversations.ui.widget.ScannerView;
 
 /**
  * @author Andreas Schildbach