diff --git a/app/(protected)/dashboard/page.tsx b/app/(protected)/dashboard/page.tsx
index d8f42b6..9190b20 100644
--- a/app/(protected)/dashboard/page.tsx
+++ b/app/(protected)/dashboard/page.tsx
@@ -4,6 +4,8 @@ import ProgressBar from "@/components/dashboard/ProgressBar";
 import ModuleCard from "@/components/dashboard/ModuleCard";
 import type { Module, UserProgress, Profile } from "@/types/database.types";
 
+export const runtime = "nodejs";
+
 export default async function DashboardPage() {
   const supabase = await createClient();
 
diff --git a/app/(protected)/formations/[moduleId]/page.tsx b/app/(protected)/formations/[moduleId]/page.tsx
index 6fb97d8..95f9d9a 100644
--- a/app/(protected)/formations/[moduleId]/page.tsx
+++ b/app/(protected)/formations/[moduleId]/page.tsx
@@ -5,6 +5,8 @@ import Card from "@/components/ui/Card";
 import MarkCompleteButton from "./MarkCompleteButton";
 import type { Module, UserProgress } from "@/types/database.types";
 
+export const runtime = "nodejs";
+
 interface ModulePageProps {
   params: Promise<{ moduleId: string }>;
 }
diff --git a/app/(protected)/formations/page.tsx b/app/(protected)/formations/page.tsx
index f9ea339..3794653 100644
--- a/app/(protected)/formations/page.tsx
+++ b/app/(protected)/formations/page.tsx
@@ -3,6 +3,8 @@ import ModuleCard from "@/components/dashboard/ModuleCard";
 import ProgressBar from "@/components/dashboard/ProgressBar";
 import type { Module, UserProgress } from "@/types/database.types";
 
+export const runtime = "nodejs";
+
 export default async function FormationsPage() {
   const supabase = await createClient();
 
diff --git a/app/(protected)/layout.tsx b/app/(protected)/layout.tsx
index 21f3c8b..7041ffa 100644
--- a/app/(protected)/layout.tsx
+++ b/app/(protected)/layout.tsx
@@ -3,6 +3,8 @@ import { createClient } from "@/lib/supabase/server";
 import Sidebar from "@/components/dashboard/Sidebar";
 import type { Profile } from "@/types/database.types";
 
+export const runtime = "nodejs";
+
 export default async function DashboardLayout({
   children,
 }: {
diff --git a/app/api/candidature/route.ts b/app/api/candidature/route.ts
index c72655d..c827fa1 100644
--- a/app/api/candidature/route.ts
+++ b/app/api/candidature/route.ts
@@ -2,6 +2,8 @@ import { NextResponse } from "next/server";
 import { createAdminClient } from "@/lib/supabase/server";
 import type { CandidatureInsert } from "@/types/database.types";
 
+export const runtime = "nodejs";
+
 export async function POST(request: Request) {
   try {
     const body = await request.json();
diff --git a/app/api/formations/[moduleId]/route.ts b/app/api/formations/[moduleId]/route.ts
index 68f2ebf..aa606eb 100644
--- a/app/api/formations/[moduleId]/route.ts
+++ b/app/api/formations/[moduleId]/route.ts
@@ -2,6 +2,8 @@ import { NextResponse } from "next/server";
 import { createClient } from "@/lib/supabase/server";
 import type { Module, UserProgress } from "@/types/database.types";
 
+export const runtime = "nodejs";
+
 // GET /api/formations/[moduleId] - Récupérer un module
 export async function GET(
   _request: Request,
diff --git a/app/api/stripe/create-checkout/route.ts b/app/api/stripe/create-checkout/route.ts
index 0c3eff7..f973150 100644
--- a/app/api/stripe/create-checkout/route.ts
+++ b/app/api/stripe/create-checkout/route.ts
@@ -2,6 +2,8 @@ import { NextResponse } from "next/server";
 import { stripe } from "@/lib/stripe/client";
 import { getBaseUrl } from "@/lib/utils";
 
+export const runtime = "nodejs";
+
 export async function POST(request: Request) {
   try {
     const body = await request.json();
diff --git a/lib/supabase/server.ts b/lib/supabase/server.ts
index 6f56612..0fe5634 100644
--- a/lib/supabase/server.ts
+++ b/lib/supabase/server.ts
@@ -1,4 +1,5 @@
 import { createServerClient } from "@supabase/ssr";
+import { createClient as createSupabaseClient } from "@supabase/supabase-js";
 import { cookies } from "next/headers";
 import type { Database } from "@/types/database.types";
 
@@ -29,17 +30,10 @@ export const createClient = async () => {
 };
 
 // Client admin avec service role (webhooks, opérations admin)
+// Utilise @supabase/supabase-js directement (pas besoin de cookies)
 export const createAdminClient = () => {
-  return createServerClient<Database>(
+  return createSupabaseClient<Database>(
     process.env.NEXT_PUBLIC_SUPABASE_URL!,
-    process.env.SUPABASE_SERVICE_ROLE_KEY!,
-    {
-      cookies: {
-        getAll() {
-          return [];
-        },
-        setAll() {},
-      },
-    }
+    process.env.SUPABASE_SERVICE_ROLE_KEY!
   );
 };
diff --git a/next.config.ts b/next.config.ts
index e9ffa30..fafd533 100644
--- a/next.config.ts
+++ b/next.config.ts
@@ -1,7 +1,7 @@
 import type { NextConfig } from "next";
 
 const nextConfig: NextConfig = {
-  /* config options here */
+  serverExternalPackages: ["@supabase/ssr"],
 };
 
 export default nextConfig;