diff --git a/app/src/main/java/app/fedilab/android/activities/PeertubeRegisterActivity.java b/app/src/main/java/app/fedilab/android/activities/PeertubeRegisterActivity.java
index e2e03f585..423775396 100644
--- a/app/src/main/java/app/fedilab/android/activities/PeertubeRegisterActivity.java
+++ b/app/src/main/java/app/fedilab/android/activities/PeertubeRegisterActivity.java
@@ -17,7 +17,6 @@ package app.fedilab.android.activities;
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.content.Context;
-import android.content.DialogInterface;
 import android.content.SharedPreferences;
 import android.graphics.drawable.ColorDrawable;
 import android.os.Bundle;
@@ -82,9 +81,6 @@ public class PeertubeRegisterActivity extends BaseActivity implements OnRetrieve
             case Helper.THEME_LIGHT:
                 setTheme(R.style.AppTheme_Fedilab);
                 break;
-            case Helper.THEME_DARK:
-                setTheme(R.style.AppThemeDark);
-                break;
             case Helper.THEME_BLACK:
                 setTheme(R.style.AppThemeBlack);
                 break;
@@ -103,12 +99,7 @@ public class PeertubeRegisterActivity extends BaseActivity implements OnRetrieve
             actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
             ImageView toolbar_close = actionBar.getCustomView().findViewById(R.id.toolbar_close);
             TextView toolbar_title = actionBar.getCustomView().findViewById(R.id.toolbar_title);
-            toolbar_close.setOnClickListener(new View.OnClickListener() {
-                @Override
-                public void onClick(View v) {
-                    finish();
-                }
-            });
+            toolbar_close.setOnClickListener(v -> finish());
             toolbar_title.setText(R.string.sign_up);
         }
 
@@ -271,12 +262,9 @@ public class PeertubeRegisterActivity extends BaseActivity implements OnRetrieve
         }
         AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(PeertubeRegisterActivity.this, style);
         dialogBuilder.setCancelable(false);
-        dialogBuilder.setPositiveButton(R.string.validate, new DialogInterface.OnClickListener() {
-            @Override
-            public void onClick(DialogInterface dialog, int which) {
-                dialog.dismiss();
-                finish();
-            }
+        dialogBuilder.setPositiveButton(R.string.validate, (dialog, which) -> {
+            dialog.dismiss();
+            finish();
         });
         AlertDialog alertDialog = dialogBuilder.create();
         alertDialog.setTitle(getString(R.string.account_created));