diff --git a/client/src/pages/Login.tsx b/client/src/pages/Login.tsx
index 6edecb6..7221f36 100644
--- a/client/src/pages/Login.tsx
+++ b/client/src/pages/Login.tsx
@@ -1,19 +1,31 @@
 import { useState } from "react";
 import { useForm } from "react-hook-form";
 import { zodResolver } from "@hookform/resolvers/zod";
+import { useQuery } from "@tanstack/react-query";
 import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { Form, FormControl, FormField, FormItem, FormLabel, FormMessage } from "@/components/ui/form";
+import { Alert, AlertDescription } from "@/components/ui/alert";
 import { useToast } from "@/hooks/use-toast";
 import { useAuth } from "@/hooks/useAuth";
 import { loginSchema, type LoginData } from "@shared/schema";
-import { LogIn, Sparkles } from "lucide-react";
+import { LogIn, Sparkles, Info } from "lucide-react";
+import { apiRequest } from "@/lib/queryClient";
 
 export default function Login() {
   const { login, isLoggingIn } = useAuth();
   const { toast } = useToast();
 
+  // Check if default credentials should be shown
+  const { data: credentialsStatus } = useQuery({
+    queryKey: ['/api/auth/default-credentials-status'],
+    queryFn: async () => {
+      const response = await apiRequest('/api/auth/default-credentials-status');
+      return response.json();
+    },
+  });
+
   const form = useForm<LoginData>({
     resolver: zodResolver(loginSchema),
     defaultValues: {
@@ -86,13 +98,23 @@ export default function Login() {
             </form>
           </Form>
           
-          <div className="mt-6 p-4 bg-blue-50 rounded-lg border border-blue-200">
-            <h4 className="font-medium text-blue-900 mb-2">Compte par défaut :</h4>
-            <div className="text-sm text-blue-700 space-y-1">
-              <p><strong>Utilisateur :</strong> admin</p>
-              <p><strong>Mot de passe :</strong> admin123</p>
-            </div>
-          </div>
+          {credentialsStatus?.showDefaultCredentials && (
+            <Alert className="mt-6">
+              <Info className="h-4 w-4" />
+              <AlertDescription>
+                <div className="space-y-2">
+                  <p className="font-medium">Compte administrateur par défaut :</p>
+                  <div className="text-sm space-y-1">
+                    <p><strong>Utilisateur :</strong> admin</p>
+                    <p><strong>Mot de passe :</strong> admin123</p>
+                  </div>
+                  <p className="text-xs text-orange-600 mt-2">
+                    ⚠️ Changez ce mot de passe après votre première connexion pour sécuriser l'application.
+                  </p>
+                </div>
+              </AlertDescription>
+            </Alert>
+          )}
         </CardContent>
       </Card>
     </div>
diff --git a/replit.md b/replit.md
index f67b3be..a34c963 100644
--- a/replit.md
+++ b/replit.md
@@ -174,4 +174,10 @@ Preferred communication style: Simple, everyday language.
 - ✅ Backup files stored in server/backups/ directory with timestamped filenames
 - ✅ Enhanced administration interface showing backup statistics and manual backup creation
 - ✅ Real-time backup status monitoring with automatic stats refresh every 30 seconds
-- ✅ Initial backup creation on server startup if no backups exist
\ No newline at end of file
+- ✅ Initial backup creation on server startup if no backups exist
+
+### Security Improvements (January 9, 2025)
+- ✅ Enhanced login page to hide default admin credentials (admin/admin123) once password is changed
+- ✅ Added dynamic credential visibility based on whether default password is still in use
+- ✅ Security warning displayed when default credentials are shown
+- ✅ API endpoint to check default credential status with password hash comparison
\ No newline at end of file
diff --git a/server/routes.ts b/server/routes.ts
index 7f53a3f..f8e4a74 100644
--- a/server/routes.ts
+++ b/server/routes.ts
@@ -105,6 +105,17 @@ export async function registerRoutes(app: Express): Promise<Server> {
     });
   });
 
+  // Check if default admin credentials are still in use
+  app.get('/api/auth/default-credentials-status', async (req, res) => {
+    try {
+      const isUsingDefault = await storage.isUsingDefaultPassword();
+      res.json({ showDefaultCredentials: isUsingDefault });
+    } catch (error) {
+      console.error('Default credentials check error:', error);
+      res.status(500).json({ error: "Failed to check default credentials status" });
+    }
+  });
+
   app.get('/api/auth/me', requireAuth, async (req, res) => {
     try {
       const user = await storage.getUser(req.session.userId!);
diff --git a/server/storage.ts b/server/storage.ts
index caf4b29..595711f 100644
--- a/server/storage.ts
+++ b/server/storage.ts
@@ -39,6 +39,7 @@ export interface IStorage {
   authenticateUser(username: string, password: string): Promise<User | null>;
   hashPassword(password: string): Promise<string>;
   initializeDefaults(): Promise<{ defaultAdminCredentials?: { username: string; password: string } }>;
+  isUsingDefaultPassword(): Promise<boolean>;
 }
 
 export class DatabaseStorage implements IStorage {
@@ -168,6 +169,17 @@ export class DatabaseStorage implements IStorage {
     return await bcrypt.hash(password, 12);
   }
 
+  // Check if admin still uses default password
+  async isUsingDefaultPassword(): Promise<boolean> {
+    const adminUser = await this.getUserByUsername('admin');
+    if (!adminUser) {
+      return false;
+    }
+    
+    // Check if the stored password hash matches the default password "admin123"
+    return await bcrypt.compare('admin123', adminUser.password);
+  }
+
   // Initialize default admin user and store if none exist
   async initializeDefaults(): Promise<{ defaultAdminCredentials?: { username: string; password: string } }> {
     const existingUsers = await this.getAllUsers();