diff --git a/app/Http/Controllers/Admin/DashboardController.php b/app/Http/Controllers/Admin/DashboardController.php
index a26875b..134ca1e 100644
--- a/app/Http/Controllers/Admin/DashboardController.php
+++ b/app/Http/Controllers/Admin/DashboardController.php
@@ -50,12 +50,21 @@ class DashboardController extends Controller
             ->take(10)
             ->get();
 
-        // Activité mensuelle des 6 derniers mois
-        $activiteMensuelle = Releve::selectRaw("to_char(date_trunc('month', created_at), 'Mon YYYY') as mois, count(*) as total")
-            ->where('created_at', '>=', now()->subMonths(5)->startOfMonth())
-            ->groupByRaw("date_trunc('month', created_at)")
-            ->orderByRaw("date_trunc('month', created_at)")
-            ->get();
+        // Activité mensuelle des 6 derniers mois (compatible MySQL et PostgreSQL)
+        $driver = config('database.default');
+        if ($driver === 'pgsql') {
+            $activiteMensuelle = Releve::selectRaw("to_char(date_trunc('month', created_at), 'Mon YYYY') as mois, count(*) as total")
+                ->where('created_at', '>=', now()->subMonths(5)->startOfMonth())
+                ->groupByRaw("date_trunc('month', created_at)")
+                ->orderByRaw("date_trunc('month', created_at)")
+                ->get();
+        } else {
+            $activiteMensuelle = Releve::selectRaw("DATE_FORMAT(created_at, '%b %Y') as mois, count(*) as total")
+                ->where('created_at', '>=', now()->subMonths(5)->startOfMonth())
+                ->groupByRaw("DATE_FORMAT(created_at, '%Y-%m')")
+                ->orderByRaw("DATE_FORMAT(created_at, '%Y-%m')")
+                ->get();
+        }
 
         return view('admin.dashboard', compact(
             'sourcesByStatus', 'totalSources', 'totalReleves',