diff --git a/app/api/create-portal-session/route.ts b/app/api/create-portal-session/route.ts
index 4c2bd9b..8641c55 100644
--- a/app/api/create-portal-session/route.ts
+++ b/app/api/create-portal-session/route.ts
@@ -1,12 +1,18 @@
 import { type NextRequest, NextResponse } from "next/server"
 import Stripe from "stripe"
 
-const stripe = new Stripe(process.env.STRIPE_SECRET_KEY!, {
-  apiVersion: "2024-06-20",
-})
-
 export async function POST(request: NextRequest) {
   try {
+    const stripeSecretKey = process.env.STRIPE_SECRET_KEY?.trim()
+
+    if (!stripeSecretKey) {
+      return NextResponse.json({ error: "Stripe configuration missing" }, { status: 500 })
+    }
+
+    const stripe = new Stripe(stripeSecretKey, {
+      apiVersion: "2024-06-20",
+    })
+
     const { session_id } = await request.json()
 
     const checkoutSession = await stripe.checkout.sessions.retrieve(session_id)
diff --git a/app/api/webhook/route.ts b/app/api/webhook/route.ts
index a32c533..e31a2e7 100644
--- a/app/api/webhook/route.ts
+++ b/app/api/webhook/route.ts
@@ -1,14 +1,19 @@
 import { type NextRequest, NextResponse } from "next/server"
 import Stripe from "stripe"
 
-const stripe = new Stripe(process.env.STRIPE_SECRET_KEY!, {
-  apiVersion: "2024-06-20",
-})
-
-const webhookSecret = process.env.STRIPE_WEBHOOK_SECRET!
-
 export async function POST(request: NextRequest) {
   try {
+    const stripeSecretKey = process.env.STRIPE_SECRET_KEY?.trim()
+    const webhookSecret = process.env.STRIPE_WEBHOOK_SECRET?.trim()
+
+    if (!stripeSecretKey || !webhookSecret) {
+      return NextResponse.json({ error: "Stripe configuration missing" }, { status: 500 })
+    }
+
+    const stripe = new Stripe(stripeSecretKey, {
+      apiVersion: "2024-06-20",
+    })
+
     const body = await request.text()
     const signature = request.headers.get("stripe-signature")!
 
diff --git a/next.config.mjs b/next.config.mjs
index 2a43a90..f5cbc38 100644
--- a/next.config.mjs
+++ b/next.config.mjs
@@ -9,9 +9,6 @@ const nextConfig = {
   images: {
     unoptimized: true,
   },
-  experimental: {
-    runtime: 'experimental-edge',
-  },
 }
 
 export default nextConfig
diff --git a/package.json b/package.json
index 01b53a5..14a8658 100644
--- a/package.json
+++ b/package.json
@@ -57,7 +57,7 @@
     "@types/react": "^19",
     "@types/react-dom": "^19",
     "eslint": "^9.17.0",
-    "eslint-config-next": "15.1.3",
+    "eslint-config-next": "15.2.4",
     "postcss": "^8.5",
     "tailwindcss": "^4.1.9",
     "typescript": "^5",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index a92ec8c..29dee50 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -139,8 +139,8 @@ importers:
         specifier: ^9.17.0
         version: 9.17.0(jiti@2.5.1)
       eslint-config-next:
-        specifier: 15.1.3
-        version: 15.1.3(eslint@9.17.0(jiti@2.5.1))(typescript@5.0.2)
+        specifier: 15.2.4
+        version: 15.2.4(eslint@9.17.0(jiti@2.5.1))(typescript@5.0.2)
       postcss:
         specifier: ^8.5
         version: 8.5.0
@@ -646,8 +646,8 @@ packages:
   '@next/env@15.2.4':
     resolution: {integrity: sha512-+SFtMgoiYP3WoSswuNmxJOCwi06TdWE733D+WPjpXIe4LXGULwEaofiiAy6kbS0+XjM5xF5n3lKuBwN2SnqD9g==}
 
-  '@next/eslint-plugin-next@15.1.3':
-    resolution: {integrity: sha512-oeP1vnc5Cq9UoOb8SYHAEPbCXMzOgG70l+Zfd+Ie00R25FOm+CCVNrcIubJvB1tvBgakXE37MmqSycksXVPRqg==}
+  '@next/eslint-plugin-next@15.2.4':
+    resolution: {integrity: sha512-O8ScvKtnxkp8kL9TpJTTKnMqlkZnS+QxwoQnJwPGBxjBbzd6OVVPEJ5/pMNrktSyXQD/chEfzfFzYLM6JANOOQ==}
 
   '@next/swc-darwin-arm64@15.2.4':
     resolution: {integrity: sha512-1AnMfs655ipJEDC/FHkSr0r3lXBgpqKo4K1kiwfUf3iE68rDFXZ1TtHdMvf7D0hMItgDZ7Vuq3JgNMbt/+3bYw==}
@@ -2473,8 +2473,8 @@ packages:
     resolution: {integrity: sha512-TtpcNJ3XAzx3Gq8sWRzJaVajRs0uVxA2YAkdb1jm2YkPz4G6egUFAyA3n5vtEIZefPk5Wa4UXbKuS5fKkJWdgA==}
     engines: {node: '>=10'}
 
-  eslint-config-next@15.1.3:
-    resolution: {integrity: sha512-wGYlNuWnh4ujuKtZvH+7B2Z2vy9nONZE6ztd+DKF7hAsIabkrxmD4TzYHzASHENo42lmz2tnT2B+zN2sOHvpJg==}
+  eslint-config-next@15.2.4:
+    resolution: {integrity: sha512-v4gYjd4eYIme8qzaJItpR5MMBXJ0/YV07u7eb50kEnlEmX7yhOjdUdzz70v4fiINYRjLf8X8TbogF0k7wlz6sA==}
     peerDependencies:
       eslint: ^7.23.0 || ^8.0.0 || ^9.0.0
       typescript: '>=3.3.1'
@@ -4609,7 +4609,7 @@ snapshots:
 
   '@next/env@15.2.4': {}
 
-  '@next/eslint-plugin-next@15.1.3':
+  '@next/eslint-plugin-next@15.2.4':
     dependencies:
       fast-glob: 3.3.1
 
@@ -6531,9 +6531,9 @@ snapshots:
 
   escape-string-regexp@4.0.0: {}
 
-  eslint-config-next@15.1.3(eslint@9.17.0(jiti@2.5.1))(typescript@5.0.2):
+  eslint-config-next@15.2.4(eslint@9.17.0(jiti@2.5.1))(typescript@5.0.2):
     dependencies:
-      '@next/eslint-plugin-next': 15.1.3
+      '@next/eslint-plugin-next': 15.2.4
       '@rushstack/eslint-patch': 1.12.0
       '@typescript-eslint/eslint-plugin': 8.42.0(@typescript-eslint/parser@8.42.0(eslint@9.17.0(jiti@2.5.1))(typescript@5.0.2))(eslint@9.17.0(jiti@2.5.1))(typescript@5.0.2)
       '@typescript-eslint/parser': 8.42.0(eslint@9.17.0(jiti@2.5.1))(typescript@5.0.2)