diff --git a/.env.example b/.env.example
index c9a868c..5fb97bc 100644
--- a/.env.example
+++ b/.env.example
@@ -63,3 +63,5 @@ AWS_BUCKET=
 AWS_USE_PATH_STYLE_ENDPOINT=false
 
 VITE_APP_NAME="${APP_NAME}"
+
+HEALTH_CHECK_INTERVAL=24
diff --git a/app/Console/Commands/PerformSiteHealthCheck.php b/app/Console/Commands/PerformSiteHealthCheck.php
index f8c63ad..856a977 100644
--- a/app/Console/Commands/PerformSiteHealthCheck.php
+++ b/app/Console/Commands/PerformSiteHealthCheck.php
@@ -25,10 +25,13 @@ class PerformSiteHealthCheck extends Command
     /**
      * Execute the console command.
      */
-    public function handle()
+    public function handle(): int
     {
-        CheckSiteHealth::dispatchSync(
-            Site::findOrFail($this->input->getArgument('siteId'))
-        );
+        /** @var Site $site */
+        $site = Site::findOrFail($this->input->getArgument('siteId'));
+
+        CheckSiteHealth::dispatchSync($site);
+
+        return Command::SUCCESS;
     }
 }
diff --git a/app/Console/Commands/QueueHealthChecks.php b/app/Console/Commands/QueueHealthChecks.php
new file mode 100644
index 0000000..06cd153
--- /dev/null
+++ b/app/Console/Commands/QueueHealthChecks.php
@@ -0,0 +1,61 @@
+<?php
+
+namespace App\Console\Commands;
+
+use App\Jobs\CheckSiteHealth;
+use App\Models\Site;
+use Carbon\Carbon;
+use Illuminate\Console\Command;
+use Illuminate\Database\Eloquent\Collection;
+
+class QueueHealthChecks extends Command
+{
+    protected int $totalPushed = 0;
+
+    /**
+     * The name and signature of the console command.
+     *
+     * @var string
+     */
+    protected $signature = 'app:queue-health-checks';
+
+    /**
+     * The console command description.
+     *
+     * @var string
+     */
+    protected $description = 'Pushes pending health checks to queue';
+
+    /**
+     * Execute the console command.
+     */
+    public function handle(): int
+    {
+        $this->output->writeln('Pushing pending health checks');
+
+        Site::query()
+            ->whereDate(
+                'last_seen',
+                '<',
+                Carbon::now()->subHours((int) config('autoupdates.healthcheck_interval')) // @phpstan-ignore-line
+            )
+            ->chunkById(
+                100,
+                function (Collection $chunk) {
+                    // Show progress
+                    $this->output->write('.');
+
+                    $this->totalPushed += $chunk->count();
+
+                    // Push each site check to queue
+                    $chunk->each(fn ($site) => CheckSiteHealth::dispatch($site));
+                }
+            );
+
+        // Result
+        $this->output->writeln("");
+        $this->output->writeln('Pushed ' . $this->totalPushed . ' pending jobs to queue');
+
+        return Command::SUCCESS;
+    }
+}
diff --git a/app/Jobs/CheckSiteHealth.php b/app/Jobs/CheckSiteHealth.php
index 3e0ab36..6de3a2c 100644
--- a/app/Jobs/CheckSiteHealth.php
+++ b/app/Jobs/CheckSiteHealth.php
@@ -6,6 +6,7 @@
 
 use App\Models\Site;
 use App\Services\SiteConnectionService;
+use Carbon\Carbon;
 use Illuminate\Contracts\Queue\ShouldQueue;
 use Illuminate\Foundation\Queue\Queueable;
 
@@ -33,7 +34,7 @@ public function handle(): void
         $healthData = collect($response);
 
         // Write updated data to DB
-        $this->site->update(
+        $this->site->fill(
             $healthData->only([
                 'php_version',
                 'db_type',
@@ -42,5 +43,9 @@ public function handle(): void
                 'server_os'
             ])->toArray()
         );
+
+        // @phpstan-ignore-next-line
+        $this->site->last_seen = Carbon::now();
+        $this->site->save();
     }
 }
diff --git a/app/Services/SiteConnectionService.php b/app/Services/SiteConnectionService.php
index af19cb5..a855e9c 100644
--- a/app/Services/SiteConnectionService.php
+++ b/app/Services/SiteConnectionService.php
@@ -95,12 +95,23 @@ protected function performHttpRequest(
             );
         }
 
-        // Return decoded body
-        return json_decode(
+        // Decode body
+        $return = json_decode(
             (string) $response->getBody(),
             true,
             512,
             JSON_THROW_ON_ERROR
         );
+
+        // Make sure it's an array
+        if (!is_array($return)) {
+            throw new RequestException(
+                "Invalid JSON body",
+                $request,
+                $response
+            );
+        }
+
+        return $return;
     }
 }
diff --git a/config/app.php b/config/app.php
index 7200021..c10c9c9 100644
--- a/config/app.php
+++ b/config/app.php
@@ -121,6 +121,5 @@
     'maintenance' => [
         'driver' => env('APP_MAINTENANCE_DRIVER', 'file'),
         'store' => env('APP_MAINTENANCE_STORE', 'database'),
-    ],
-
+    ]
 ];
diff --git a/config/autoupdates.php b/config/autoupdates.php
new file mode 100644
index 0000000..8ca0839
--- /dev/null
+++ b/config/autoupdates.php
@@ -0,0 +1,5 @@
+<?php
+
+return [
+    'healthcheck_interval' => env('HEALTH_CHECK_INTERVAL', 24)
+];
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index 23cd8c3..cde55cc 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -7,5 +7,8 @@ parameters:
     paths:
         - app/
 
-    # Level 9 is the highest level
-    level: 5
+    level: 9
+
+    ignoreErrors:
+        - '#Method .* return type has no value type specified in iterable type array.#'
+        - '#Method .* has parameter .* with no value type specified in iterable type array.#'
diff --git a/routes/console.php b/routes/console.php
index ec6db2f..b05cd0e 100644
--- a/routes/console.php
+++ b/routes/console.php
@@ -2,5 +2,7 @@
 
 use Illuminate\Support\Facades\Schedule;
 use Illuminate\Queue\Console\PruneFailedJobsCommand;
+use App\Console\Commands\QueueHealthChecks;
 
 Schedule::command(PruneFailedJobsCommand::class)->daily();
+Schedule::command(QueueHealthChecks::class)->everyFifteenMinutes();