diff --git a/Dockerfile b/Dockerfile
index 8f7a7a8..b298e43 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Use Python 3.13 slim image as base
-FROM python:3.13-slim AS builder
+FROM python:3.14-slim AS builder
 
 # Set working directory
 WORKDIR /app
@@ -17,7 +17,7 @@ RUN --mount=type=cache,id=pip,target=/root/.cache/pip \
     --target=/app/site-packages \
     -r requirements.txt
 
-FROM python:3.13-slim
+FROM python:3.14-slim
 
 COPY --from=builder /app/site-packages /app/site-packages
 
diff --git a/app/templates/index.html b/app/templates/index.html
index 4e68cce..e666cbf 100644
--- a/app/templates/index.html
+++ b/app/templates/index.html
@@ -5,17 +5,42 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Générateur d'Exercices de Mathématiques</title>
     <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.0/font/bootstrap-icons.css" rel="stylesheet">
     <style>
+        :root {
+            --bs-body-bg: #ffffff;
+            --bs-body-color: #212529;
+            --bs-border-color: #dee2e6;
+            --bs-secondary-bg: #f8f9fa;
+            --bs-tertiary-bg: #ffffff;
+        }
+
+        [data-bs-theme="dark"] {
+            --bs-body-bg: #121212;
+            --bs-body-color: #e9ecef;
+            --bs-border-color: #495057;
+            --bs-secondary-bg: #212529;
+            --bs-tertiary-bg: #343a40;
+        }
+
+        body {
+            background-color: var(--bs-body-bg);
+            color: var(--bs-body-color);
+            transition: background-color 0.3s ease, color 0.3s ease;
+        }
+
         .card {
             box-shadow: 0 4px 8px rgba(0,0,0,0.1);
             transition: 0.3s;
             margin-bottom: 20px;
+            background-color: var(--bs-tertiary-bg);
+            border-color: var(--bs-border-color);
         }
         .card:hover {
             box-shadow: 0 8px 16px rgba(0,0,0,0.2);
         }
         .exercise-result {
-            background-color: #f8f9fa;
+            background-color: var(--bs-secondary-bg);
             border-radius: 5px;
             padding: 15px;
             margin-top: 20px;
@@ -25,9 +50,81 @@
             height: 3rem;
             margin-right: 0.75rem;
         }
+
+        .dark-mode-toggle {
+            position: fixed;
+            top: 20px;
+            right: 20px;
+            z-index: 1000;
+            border-radius: 50%;
+            width: 50px;
+            height: 50px;
+            border: none;
+            background-color: var(--bs-tertiary-bg);
+            color: var(--bs-body-color);
+            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
+            transition: all 0.3s ease;
+        }
+
+        .dark-mode-toggle:hover {
+            transform: translateY(-2px);
+            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
+        }
+
+        [data-bs-theme="dark"] .bg-light {
+            background-color: var(--bs-secondary-bg) !important;
+        }
+
+        [data-bs-theme="dark"] .text-muted {
+            color: var(--bs-body-color) !important;
+            opacity: 0.7;
+        }
+
+        [data-bs-theme="dark"] .table {
+            --bs-table-bg: var(--bs-tertiary-bg);
+            --bs-table-striped-bg: var(--bs-secondary-bg);
+            --bs-table-hover-bg: var(--bs-border-color);
+        }
+
+        [data-bs-theme="dark"] .alert {
+            border-color: var(--bs-border-color);
+        }
+
+        [data-bs-theme="dark"] .form-control,
+        [data-bs-theme="dark"] .form-select {
+            background-color: var(--bs-tertiary-bg);
+            border-color: var(--bs-border-color);
+            color: var(--bs-body-color);
+        }
+
+        [data-bs-theme="dark"] .form-control:focus,
+        [data-bs-theme="dark"] .form-select:focus {
+            background-color: var(--bs-tertiary-bg);
+            border-color: var(--bs-primary);
+            color: var(--bs-body-color);
+            box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
+        }
+
+        [data-bs-theme="dark"] .form-check-input {
+            background-color: var(--bs-tertiary-bg);
+            border-color: var(--bs-border-color);
+        }
+
+        [data-bs-theme="dark"] .form-check-input:checked {
+            background-color: var(--bs-primary);
+            border-color: var(--bs-primary);
+        }
+
+        .transition-all {
+            transition: all 0.3s ease;
+        }
     </style>
 </head>
 <body>
+    <!-- Dark Mode Toggle Button -->
+    <button class="dark-mode-toggle" id="darkModeToggle" title="Basculer le mode sombre" aria-label="Basculer le mode sombre">
+        <i class="bi bi-moon-fill" id="darkModeIcon"></i>
+    </button>
     <div class="container mt-5 mb-5">
         <div class="row justify-content-center">
             <div class="col-lg-8">
@@ -251,7 +348,7 @@
         </div>
     </div>
 
-    <footer class="bg-light text-center text-muted py-4 mt-5">
+    <footer class="bg-light text-center text-muted py-4 mt-5 transition-all">
         <div class="container">
             <p>Générateur d'Exercices de Mathématiques &copy; 2025</p>
         </div>
@@ -259,6 +356,72 @@
 
 <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/js/bootstrap.bundle.min.js"></script>
     <script>
+        // Dark Mode Theme Management
+        class ThemeManager {
+            constructor() {
+                this.init();
+            }
+
+            init() {
+                // Load saved theme or detect system preference
+                const savedTheme = localStorage.getItem('theme');
+                const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light';
+                const theme = savedTheme || systemTheme;
+                
+                this.setTheme(theme);
+
+                // Listen for system theme changes
+                window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', (e) => {
+                    if (!localStorage.getItem('theme')) {
+                        this.setTheme(e.matches ? 'dark' : 'light');
+                    }
+                });
+
+                // Setup toggle button
+                this.setupToggleButton();
+            }
+
+            setTheme(theme) {
+                document.documentElement.setAttribute('data-bs-theme', theme);
+                localStorage.setItem('theme', theme);
+                this.updateToggleIcon(theme);
+            }
+
+            toggleTheme() {
+                const currentTheme = document.documentElement.getAttribute('data-bs-theme');
+                const newTheme = currentTheme === 'dark' ? 'light' : 'dark';
+                this.setTheme(newTheme);
+            }
+
+            updateToggleIcon(theme) {
+                const icon = document.getElementById('darkModeIcon');
+                if (theme === 'dark') {
+                    icon.className = 'bi bi-sun-fill';
+                } else {
+                    icon.className = 'bi bi-moon-fill';
+                }
+            }
+
+            setupToggleButton() {
+                const toggleButton = document.getElementById('darkModeToggle');
+                toggleButton.addEventListener('click', () => {
+                    this.toggleTheme();
+                    this.animateToggle();
+                });
+            }
+
+            animateToggle() {
+                const button = document.getElementById('darkModeToggle');
+                button.style.transform = 'scale(0.9)';
+                setTimeout(() => {
+                    button.style.transform = '';
+                }, 150);
+            }
+        }
+
+        // Initialize theme manager
+        const themeManager = new ThemeManager();
+
         // Current page for pagination
         let currentPage = 1;
         const pageSize = 10;
@@ -485,8 +648,11 @@
         
         // Load PDF list on page load
         document.addEventListener('DOMContentLoaded', function() {
-            restoreFormValues();
-            loadPdfList(currentPage);
+            // Ensure theme is initialized first
+            setTimeout(() => {
+                restoreFormValues();
+                loadPdfList(currentPage);
+            }, 100);
         });
         
         // Add event listeners to save form values on change
diff --git a/requirements.txt b/requirements.txt
index a7957b9..07025cb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,32 +1,32 @@
+annotated-doc==0.0.4
 annotated-types==0.7.0
-anyio==4.10.0
-boto3==1.26.160
-boto3-stubs==1.40.23
-botocore==1.29.165
-botocore-stubs==1.40.23
-click==8.2.1
+anyio==4.12.0
+boto3==1.42.6
+boto3-stubs==1.42.6
+botocore==1.42.6
+botocore-stubs==1.42.6
+click==8.3.1
 defusedxml==0.7.1
-fastapi==0.116.1
-fonttools==4.59.2
-fpdf2==2.8.4
+fastapi==0.124.0
+fonttools==4.61.0
+fpdf2==2.8.5
 h11==0.16.0
-idna==3.10
-Jinja2==3.1.4
+idna==3.11
+Jinja2==3.1.6
 jmespath==1.0.1
-MarkupSafe==3.0.2
-pillow==11.3.0
-pydantic==2.11.7
-pydantic_core==2.33.2
+MarkupSafe==3.0.3
+pillow==12.0.0
+pydantic==2.12.5
+pydantic_core==2.41.5
 python-dateutil==2.9.0.post0
-python-multipart==0.0.9
-s3transfer==0.6.2
+python-multipart==0.0.20
+s3transfer==0.16.0
 six==1.17.0
 sniffio==1.3.1
-starlette==0.47.3
-types-awscrt==0.27.6
-types-fpdf2==2.8.4.20250822
-types-s3transfer==0.13.1
-typing-inspection==0.4.1
+starlette==0.50.0
+types-awscrt==0.29.2
+types-s3transfer==0.16.0
+typing-inspection==0.4.2
 typing_extensions==4.15.0
-urllib3==1.26.20
-uvicorn==0.30.6
+urllib3==2.6.1
+uvicorn==0.38.0