diff --git a/app/Http/Controllers/Settings/SubscriptionController.php b/app/Http/Controllers/Settings/SubscriptionController.php
index dbf21590df..eea7fc8f24 100644
--- a/app/Http/Controllers/Settings/SubscriptionController.php
+++ b/app/Http/Controllers/Settings/SubscriptionController.php
@@ -198,11 +198,11 @@ public function subscribe(UserSubscribeStore $request, Tier $tier)
                 return redirect()
                     ->route('settings.subscription')
                     ->with('error_raw', __('subscription.errors.invalid_currency', [
-                        'old' => strtoupper($currencies[1][0]),
-                        'new' => strtoupper($currencies[1][1]),
+                        'old' => mb_strtoupper($currencies[1][0]),
+                        'new' => mb_strtoupper($currencies[1][1]),
                         'email' => '<a href="mailto:' . config('app.email') . '">' . config('app.email') . '</a>'
                     ]))
-                    ;
+                ;
             }
             // Error? json
             return response()->json([
diff --git a/app/Policies/CampaignPolicy.php b/app/Policies/CampaignPolicy.php
index 1c3a2937bc..b752ec9aa0 100644
--- a/app/Policies/CampaignPolicy.php
+++ b/app/Policies/CampaignPolicy.php
@@ -205,7 +205,6 @@ public function members(?User $user, Campaign $campaign): bool
 
     /**
      * Permission to view the campaign submissions
-     * @return bool
      */
     public function submissions(?User $user): bool
     {