diff --git a/src/app/api/admin/users/[accountId]/admin/route.ts b/src/app/api/admin/users/[accountId]/admin/route.ts
index af3760d..3be4129 100644
--- a/src/app/api/admin/users/[accountId]/admin/route.ts
+++ b/src/app/api/admin/users/[accountId]/admin/route.ts
@@ -7,7 +7,7 @@ import logger from '@/lib/logger';
 
 export async function POST(
   req: NextRequest,
-  { params }: { params: { accountId: string } }
+  { params }: { params: Promise<{ accountId: string }> }
 ) {
   try {
     const session = await getServerSession(authOptions);
@@ -19,7 +19,7 @@ export async function POST(
       }, { status: 401 });
     }
     
-    const { accountId } = params;
+    const { accountId } = await params;
     
     if (!accountId) {
       return NextResponse.json({
@@ -58,7 +58,7 @@ export async function POST(
       success: true,
     });
   } catch (error) {
-    logger.error('Error toggling admin status:', { error });
+    logger.error('Error toggling admin status:', error);
     return NextResponse.json({
       message: "Failed to toggle admin status",
       success: false,
diff --git a/src/app/api/admin/users/[accountId]/links/[shortId]/analytics/route.ts b/src/app/api/admin/users/[accountId]/links/[shortId]/analytics/route.ts
index c8f7820..402cf13 100644
--- a/src/app/api/admin/users/[accountId]/links/[shortId]/analytics/route.ts
+++ b/src/app/api/admin/users/[accountId]/links/[shortId]/analytics/route.ts
@@ -7,7 +7,7 @@ import logger from '@/lib/logger';
 
 export async function GET(
   req: NextRequest,
-  { params }: { params: { accountId: string, shortId: string } }
+  { params }: { params: Promise<{ accountId: string, shortId: string }> }
 ) {
   try {
     const session = await getServerSession(authOptions);
@@ -51,7 +51,7 @@ export async function GET(
       success: true,
     });
   } catch (error) {
-    logger.error('Error getting analytics:', { error, accountId: params.accountId, shortId: params.shortId });
+    logger.error('Error getting analytics:', { error, accountId: (await params).accountId, shortId: (await params).shortId });
     return NextResponse.json({
       message: "Failed to retrieve analytics",
       success: false,
@@ -61,7 +61,7 @@ export async function GET(
 
 export async function DELETE(
   req: NextRequest,
-  { params }: { params: { accountId: string, shortId: string } }
+  { params }: { params: Promise<{ accountId: string, shortId: string }> }
 ) {
   try {
     const session = await getServerSession(authOptions);
@@ -107,7 +107,7 @@ export async function DELETE(
       success: false,
     }, { status: 400 });
   } catch (error) {
-    logger.error('Error deleting analytics:', { error, accountId: params.accountId, shortId: params.shortId });
+    logger.error('Error deleting analytics:', { error, accountId: (await params).accountId, shortId: (await params).shortId });
     return NextResponse.json({
       message: "Failed to delete analytics",
       success: false,
diff --git a/src/app/api/admin/users/[accountId]/links/[shortId]/route.ts b/src/app/api/admin/users/[accountId]/links/[shortId]/route.ts
index 6fdb5a8..16c971a 100644
--- a/src/app/api/admin/users/[accountId]/links/[shortId]/route.ts
+++ b/src/app/api/admin/users/[accountId]/links/[shortId]/route.ts
@@ -7,7 +7,7 @@ import logger from '@/lib/logger';
 
 export async function GET(
   req: NextRequest,
-  { params }: { params: { accountId: string, shortId: string } }
+  { params }: { params: Promise<{ accountId: string, shortId: string }> }
 ) {
   try {
     const session = await getServerSession(authOptions);
@@ -42,7 +42,7 @@ export async function GET(
       success: true,
     });
   } catch (error) {
-    logger.error('Error getting link details:', { error, accountId: params.accountId, shortId: params.shortId });
+    logger.error('Error getting link details:', { error, accountId: (await params).accountId, shortId: (await params).shortId });
     return NextResponse.json({
       message: "Failed to retrieve link details",
       success: false,
@@ -52,7 +52,7 @@ export async function GET(
 
 export async function PATCH(
   req: NextRequest,
-  { params }: { params: { accountId: string, shortId: string } }
+  { params }: { params: Promise<{ accountId: string, shortId: string }> }
 ) {
   try {
     const session = await getServerSession(authOptions);
@@ -90,7 +90,7 @@ export async function PATCH(
       success: result.success,
     }, { status: result.success ? 200 : 400 });
   } catch (error) {
-    logger.error('Error updating link:', { error, accountId: params.accountId, shortId: params.shortId });
+    logger.error('Error updating link:', { error, accountId: (await params).accountId, shortId: (await params).shortId });
     return NextResponse.json({
       message: "Failed to update link",
       success: false,
@@ -100,7 +100,7 @@ export async function PATCH(
 
 export async function DELETE(
   req: NextRequest,
-  { params }: { params: { accountId: string, shortId: string } }
+  { params }: { params: Promise<{ accountId: string, shortId: string }> }
 ) {
   try {
     const session = await getServerSession(authOptions);
@@ -128,7 +128,7 @@ export async function DELETE(
       success: result.success,
     }, { status: result.success ? 200 : 400 });
   } catch (error) {
-    logger.error('Error deleting link:', { error, accountId: params.accountId, shortId: params.shortId });
+    logger.error('Error deleting link:', { error, accountId: (await params).accountId, shortId: (await params).shortId });
     return NextResponse.json({
       message: "Failed to delete link",
       success: false,
diff --git a/src/app/api/admin/users/[accountId]/links/route.ts b/src/app/api/admin/users/[accountId]/links/route.ts
index 550c9f3..1a4e0e5 100644
--- a/src/app/api/admin/users/[accountId]/links/route.ts
+++ b/src/app/api/admin/users/[accountId]/links/route.ts
@@ -7,7 +7,7 @@ import logger from '@/lib/logger';
 
 export async function GET(
   req: NextRequest,
-  { params }: { params: { accountId: string } }
+  { params }: { params: Promise<{ accountId: string }> }
 ) {
   try {
     const session = await getServerSession(authOptions);
@@ -36,7 +36,7 @@ export async function GET(
       success: true,
     });
   } catch (error) {
-    logger.error('Error getting user links:', { error });
+    logger.error('Error getting user links:', error);
     return NextResponse.json({
       message: "Failed to retrieve user links",
       success: false,
diff --git a/src/app/api/admin/users/[accountId]/route.ts b/src/app/api/admin/users/[accountId]/route.ts
index 87f2b37..7f8644c 100644
--- a/src/app/api/admin/users/[accountId]/route.ts
+++ b/src/app/api/admin/users/[accountId]/route.ts
@@ -7,7 +7,7 @@ import { sanitizeMongoDocument } from '@/lib/utils';
 
 export async function GET(
   req: NextRequest,
-  { params }: { params: { accountId: string } }
+  { params }: { params: Promise<{ accountId: string }> }
 ) {
   try {
     const session = await getServerSession(authOptions);
diff --git a/src/app/api/admin/users/[accountId]/sessions/route.ts b/src/app/api/admin/users/[accountId]/sessions/route.ts
index c771bda..1a866ed 100644
--- a/src/app/api/admin/users/[accountId]/sessions/route.ts
+++ b/src/app/api/admin/users/[accountId]/sessions/route.ts
@@ -7,7 +7,7 @@ import logger from '@/lib/logger';
 
 export async function GET(
   req: NextRequest,
-  { params }: { params: { accountId: string } }
+  { params }: { params: Promise<{ accountId: string }> }
 ) {
   try {
     const session = await getServerSession(authOptions);
@@ -38,7 +38,7 @@ export async function GET(
       success: true,
     });
   } catch (error) {
-    logger.error('Error getting user sessions:', { error });
+    logger.error('Error getting user sessions:', error);
     return NextResponse.json({
       message: "Failed to retrieve user sessions",
       success: false,
diff --git a/src/app/dashboard/link/[shortId]/page.tsx b/src/app/dashboard/link/[shortId]/page.tsx
index d695e88..7a32abf 100644
--- a/src/app/dashboard/link/[shortId]/page.tsx
+++ b/src/app/dashboard/link/[shortId]/page.tsx
@@ -4,12 +4,13 @@ import { useState, useEffect, useRef } from 'react';
 import { useParams, useRouter } from 'next/navigation';
 import Link from 'next/link';
 import { useToast } from '@/contexts/ToastContext';
-import Graph, { StatItem } from '@/components/ui/Graph';
+import Graph from '@/components/ui/Graph';
 import ConfirmModal from '@/components/ui/ConfirmModal';
 import AnalyticsTable from '@/components/ui/dashboard/link/AnalyticsTable';
 import styles from './LinkDetail.module.css';
 import { Analytics } from '@/types/analytics';
-import { Link as LinkType } from '@/types/link';
+import type { Link as LinkType } from '@/types/link';
+import type { StatItem } from '@/types/statistics';
 
 export default function LinkDetailPage() {
   const params = useParams();
diff --git a/src/app/l/[shortId]/route.ts b/src/app/l/[shortId]/route.ts
index 96166d3..5a47355 100644
--- a/src/app/l/[shortId]/route.ts
+++ b/src/app/l/[shortId]/route.ts
@@ -6,7 +6,7 @@ import logger from '@/lib/logger';
 
 export async function GET(
   req: NextRequest,
-  { params }: { params: { shortId: string } }
+  { params }: { params: Promise<{ shortId: string }> }
 ) {
   try {
     const { shortId } = await params;
@@ -30,7 +30,7 @@ export async function GET(
     
     return NextResponse.redirect(new URL(link.target_url));
   } catch (error) {
-    logger.error('Link redirection error', { error });
+    logger.error('Link redirection error', error);
     return NextResponse.redirect(new URL('/error', req.url));
   }
 }
\ No newline at end of file
diff --git a/src/components/ui/Graph.tsx b/src/components/ui/Graph.tsx
index 228d16f..b284097 100644
--- a/src/components/ui/Graph.tsx
+++ b/src/components/ui/Graph.tsx
@@ -265,7 +265,7 @@ export default function Graph({
               data={getBarData()} 
               options={getOptions()} 
               ref={(ref) => {
-                if (ref) chartRef.current = ref.chartInstance;
+                if (ref) chartRef.current = ref;
               }}
             />
           )}
@@ -274,7 +274,7 @@ export default function Graph({
               data={getLineData()} 
               options={getOptions()} 
               ref={(ref) => {
-                if (ref) chartRef.current = ref.chartInstance;
+                if (ref) chartRef.current = ref;
               }}
             />
           )}
@@ -283,7 +283,7 @@ export default function Graph({
               data={getDoughnutData()} 
               options={getOptions()} 
               ref={(ref) => {
-                if (ref) chartRef.current = ref.chartInstance;
+                if (ref) chartRef.current = ref;
               }}
             />
           )}
diff --git a/src/lib/mongodb.ts b/src/lib/mongodb.ts
index dc57c2e..be30113 100644
--- a/src/lib/mongodb.ts
+++ b/src/lib/mongodb.ts
@@ -1,15 +1,5 @@
 import { Db, MongoClient, ObjectId } from "mongodb";
 
-const uri = process.env.MONGO_URI!;
-const dbName = process.env.MONGO_DB_NAME!;
-
-if (!process.env.MONGO_URI) {
-  throw new Error('Please add your MongoDB URI to .env');
-}
-if (!process.env.MONGO_DB_NAME) {
-  throw new Error('Please add your MongoDB DB name to .env');
-}
-
 let client: MongoClient;
 let db: Db;
 
@@ -26,10 +16,17 @@ export async function getMongo(): Promise<{ client: MongoClient; db: Db }> {
   if (client && db) {
     return { client, db };
   }
+  
+  if (!process.env.MONGO_URI) {
+    throw new Error('Please add your MongoDB URI to .env');
+  }
+  if (!process.env.MONGO_DB_NAME) {
+    throw new Error('Please add your MongoDB DB name to .env');
+  }
 
-  client = new MongoClient(uri);
+  client = new MongoClient(process.env.MONGO_URI);
   await client.connect();
-  db = client.db(dbName);
+  db = client.db(process.env.MONGO_DB_NAME);
 
   return { client, db };
 }