diff --git a/app/Api/v1/Resources/UserAuthentication.php b/app/Api/v1/Resources/UserAuthentication.php
index 522ba14f..2b29be83 100644
--- a/app/Api/v1/Resources/UserAuthentication.php
+++ b/app/Api/v1/Resources/UserAuthentication.php
@@ -51,7 +51,7 @@ public function __construct($resource)
      */
     public function toArray($request)
     {
-        $tz = $request->user()->preferences['timezone'];
+        $tz = $request->user()?->preferences['timezone'] ?? config('app.timezone');
 
         return [
             'id'         => $this->id,
diff --git a/app/Api/v1/Resources/UserManagerResource.php b/app/Api/v1/Resources/UserManagerResource.php
index 8ccd5fd7..aa98eb40 100644
--- a/app/Api/v1/Resources/UserManagerResource.php
+++ b/app/Api/v1/Resources/UserManagerResource.php
@@ -85,7 +85,7 @@ protected function tokenExpired($createdAt)
      */
     public function toArray($request)
     {
-        $tz = $request->user()?->preferences['timezone'];
+        $tz = $request->user()?->preferences['timezone'] ?? config('app.timezone');
 
         return array_merge(
             parent::toArray($request),
diff --git a/app/Http/Middleware/KickOutInactiveUser.php b/app/Http/Middleware/KickOutInactiveUser.php
index 2d3f36d3..417b799d 100644
--- a/app/Http/Middleware/KickOutInactiveUser.php
+++ b/app/Http/Middleware/KickOutInactiveUser.php
@@ -29,7 +29,7 @@ public function handle($request, Closure $next, ...$guards)
 
         $user        = Auth::user();
         $now         = Carbon::now();
-        $inactiveFor = $now->diffInSeconds(Carbon::parse($user->last_seen_at));
+        $inactiveFor = (int) $now->diffInSeconds(Carbon::parse($user->last_seen_at), true);
 
         // Fetch all setting values
         $kickUserAfterXSecond = intval($user->preferences['kickUserAfter']) * 60;
diff --git a/app/Listeners/Authentication/LoginListener.php b/app/Listeners/Authentication/LoginListener.php
index 3b60eb7a..8e67f364 100644
--- a/app/Listeners/Authentication/LoginListener.php
+++ b/app/Listeners/Authentication/LoginListener.php
@@ -46,7 +46,7 @@ public function handle(mixed $event) : void
         $ip        = config('2fauth.proxy_headers.forIp') ?? $this->request->ip();
         $userAgent = $this->request->userAgent();
         $known     = $user->authentications()->whereIpAddress($ip)->whereUserAgent($userAgent)->whereLoginSuccessful(true)->first();
-        $newUser   = Carbon::parse($user->{$user->getCreatedAtColumn()})->diffInMinutes(Carbon::now()) < 1;
+        $newUser   = Carbon::parse($user->{$user->getCreatedAtColumn()})->diffInMinutes(Carbon::now(), true) < 1;
         $guard     = $event->guard;
 
         $log = $user->authentications()->create([
diff --git a/app/Listeners/Authentication/VisitedByProxyUserListener.php b/app/Listeners/Authentication/VisitedByProxyUserListener.php
index 6bf3695e..b7b556eb 100644
--- a/app/Listeners/Authentication/VisitedByProxyUserListener.php
+++ b/app/Listeners/Authentication/VisitedByProxyUserListener.php
@@ -25,7 +25,7 @@ public function handle(mixed $event) : void
         $ip        = config('2fauth.proxy_headers.forIp') ?? $this->request->ip();
         $userAgent = $this->request->userAgent();
         $known     = $user->authentications()->whereIpAddress($ip)->whereUserAgent($userAgent)->whereLoginSuccessful(true)->first();
-        $newUser   = Carbon::parse($user->{$user->getCreatedAtColumn()})->diffInMinutes(Carbon::now()) < 1;
+        $newUser   = Carbon::parse($user->{$user->getCreatedAtColumn()})->diffInMinutes(Carbon::now(), true) < 1;
         $guard     = config('auth.defaults.guard');
 
         $log = $user->authentications()->create([
diff --git a/tests/Api/v1/Controllers/UserManagerControllerTest.php b/tests/Api/v1/Controllers/UserManagerControllerTest.php
index e90330b2..1566c34c 100644
--- a/tests/Api/v1/Controllers/UserManagerControllerTest.php
+++ b/tests/Api/v1/Controllers/UserManagerControllerTest.php
@@ -138,8 +138,8 @@ public function test_show_returns_the_expected_UserManagerResource() : void
                     'preferences'        => $this->defaultPreferences,
                     'is_admin'           => false,
                     'twofaccounts_count' => 0,
-                    'last_seen_at'       => '1 second ago',
-                    'created_at'         => '1 second ago',
+                    'last_seen_at'       => '0 seconds ago',
+                    'created_at'         => '0 seconds ago',
                 ],
                 'password_reset'               => null,
                 'valid_personal_access_tokens' => 0,