diff --git a/src/Extension/Extension.php b/src/Extension/Extension.php
index 6ae5947f6..3707bfae0 100644
--- a/src/Extension/Extension.php
+++ b/src/Extension/Extension.php
@@ -267,7 +267,7 @@ class Extension implements Arrayable
             $extenders = [$extenders];
         }
 
-        return array_flatten($extenders);
+        return Arr::flatten($extenders);
     }
 
     /**
diff --git a/src/Foundation/Site.php b/src/Foundation/Site.php
index 13b715b2c..54dfcb7e1 100644
--- a/src/Foundation/Site.php
+++ b/src/Foundation/Site.php
@@ -9,6 +9,7 @@
 
 namespace Flarum\Foundation;
 
+use Illuminate\Support\Arr;
 use RuntimeException;
 
 class Site
@@ -62,6 +63,6 @@ class Site
             return [];
         }
 
-        return array_flatten($extenders);
+        return Arr::flatten($extenders);
     }
 }
diff --git a/src/Frontend/Content/Assets.php b/src/Frontend/Content/Assets.php
index e160adb34..50681f876 100644
--- a/src/Frontend/Content/Assets.php
+++ b/src/Frontend/Content/Assets.php
@@ -13,6 +13,7 @@ use Flarum\Foundation\Application;
 use Flarum\Frontend\Compiler\CompilerInterface;
 use Flarum\Frontend\Document;
 use Illuminate\Contracts\Container\Container;
+use Illuminate\Support\Arr;
 use Psr\Http\Message\ServerRequestInterface as Request;
 
 class Assets
@@ -48,7 +49,7 @@ class Assets
         ];
 
         if ($this->app->inDebugMode()) {
-            $this->commit(array_flatten($compilers));
+            $this->commit(Arr::flatten($compilers));
         }
 
         $document->js = array_merge($document->js, $this->getUrls($compilers['js']));
diff --git a/views/frontend/admin.blade.php b/views/frontend/admin.blade.php
index 2efce2af5..abab7d7fb 100644
--- a/views/frontend/admin.blade.php
+++ b/views/frontend/admin.blade.php
@@ -8,9 +8,9 @@
             <div id="header-navigation" class="Header-navigation"></div>
             <div class="container">
                 <h1 class="Header-title">
-                    <a href="{{ array_get($forum, 'baseUrl') }}">
-                        <?php $title = array_get($forum, 'title'); ?>
-                        @if ($logo = array_get($forum, 'logoUrl'))
+                    <a href="{{ \Illuminate\Support\Arr::get($forum, 'baseUrl') }}">
+                        <?php $title = \Illuminate\Support\Arr::get($forum, 'title'); ?>
+                        @if ($logo = \Illuminate\Support\Arr::get($forum, 'logoUrl'))
                             <img src="{{ $logo }}" alt="{{ $title }}" class="Header-logo">
                         @else
                             {{ $title }}
diff --git a/views/frontend/forum.blade.php b/views/frontend/forum.blade.php
index 01c0c7261..d4dd5cd9f 100644
--- a/views/frontend/forum.blade.php
+++ b/views/frontend/forum.blade.php
@@ -1,4 +1,4 @@
-{!! array_get($forum, 'headerHtml') !!}
+{!! \Illuminate\Support\Arr::get($forum, 'headerHtml') !!}
 
 <div id="app" class="App">
 
@@ -10,11 +10,11 @@
             <div id="header-navigation" class="Header-navigation"></div>
             <div class="container">
                 <h1 class="Header-title">
-                    <a href="{{ array_get($forum, 'baseUrl') }}" id="home-link">
-                        @if ($logo = array_get($forum, 'logoUrl'))
-                            <img src="{{ $logo }}" alt="{{ array_get($forum, 'title') }}" class="Header-logo">
+                    <a href="{{ \Illuminate\Support\Arr::get($forum, 'baseUrl') }}" id="home-link">
+                        @if ($logo = \Illuminate\Support\Arr::get($forum, 'logoUrl'))
+                            <img src="{{ $logo }}" alt="{{ \Illuminate\Support\Arr::get($forum, 'title') }}" class="Header-logo">
                         @else
-                            {{ array_get($forum, 'title') }}
+                            {{ \Illuminate\Support\Arr::get($forum, 'title') }}
                         @endif
                     </a>
                 </h1>
@@ -39,4 +39,4 @@
 
 </div>
 
-{!! array_get($forum, 'footerHtml') !!}
+{!! \Illuminate\Support\Arr::get($forum, 'footerHtml') !!}