diff --git a/mobile/App.tsx b/mobile/App.tsx
index 63bf56b9..69721f58 100644
--- a/mobile/App.tsx
+++ b/mobile/App.tsx
@@ -11,10 +11,12 @@ import { ThemeProvider, useTheme } from "./src/context/ThemeContext";
 
 import HomeScreen from "./src/screens/HomeScreen";
 import ClientLoginScreen from "./src/screens/auth/ClientLoginScreen";
+import ChangePasswordScreen from "./src/screens/auth/ChangePasswordScreen";
 import ClientNavigator from "./src/navigation/ClientNavigator";
-import type { RootStackParamList } from "./src/navigation/types";
+import type { RootStackParamList, ChangePasswordStackParamList } from "./src/navigation/types";
 
 const Stack = createNativeStackNavigator<RootStackParamList>();
+const CPStack = createNativeStackNavigator<ChangePasswordStackParamList>();
 
 function AuthStack() {
     const { colors } = useTheme();
@@ -40,8 +42,27 @@ function AuthStack() {
     );
 }
 
+function ForceChangePasswordStack() {
+    const { colors } = useTheme();
+    return (
+        <CPStack.Navigator
+            screenOptions={{
+                headerStyle: { backgroundColor: colors.bgSecondary },
+                headerTintColor: colors.textWhite,
+                gestureEnabled: false,
+            }}
+        >
+            <CPStack.Screen
+                name="ChangePassword"
+                component={ChangePasswordScreen}
+                options={{ title: "Changer le mot de passe", headerLeft: () => null }}
+            />
+        </CPStack.Navigator>
+    );
+}
+
 function RootNavigator() {
-    const { isAuthenticated, isLoading, role } = useAuth();
+    const { isAuthenticated, isLoading, role, mustChangePassword } = useAuth();
     const { colors, isDark } = useTheme();
 
     if (isLoading) {
@@ -59,6 +80,10 @@ function RootNavigator() {
         );
     }
 
+    if (isAuthenticated && role === "client" && mustChangePassword) {
+        return <ForceChangePasswordStack />;
+    }
+
     if (isAuthenticated && role === "client") {
         return (
             <CartProvider>
diff --git a/mobile/app.json b/mobile/app.json
index 4457bc5b..6310e5c1 100644
--- a/mobile/app.json
+++ b/mobile/app.json
@@ -40,7 +40,7 @@
                 "expo-notifications",
                 {
                     "icon": "./assets/icon.png",
-                    "color": "#7C3AED",
+                    "color": "#000000",
                     "defaultChannel": "orders",
                     "sounds": []
                 }
diff --git a/mobile/src/api/api.ts b/mobile/src/api/api.ts
index 793a1393..9cd35af7 100644
--- a/mobile/src/api/api.ts
+++ b/mobile/src/api/api.ts
@@ -507,6 +507,26 @@ export const cancelCommand = async (
 // PENALTIES
 // ============================================
 
+export const changePassword = async (
+    currentPassword: string,
+    newPassword: string,
+): Promise<{ success: boolean; message?: string }> => {
+    try {
+        await apiClient.put(`${V1}/auth/change-password`, {
+            current_password: currentPassword,
+            new_password: newPassword,
+        });
+        return { success: true };
+    } catch (error: any) {
+        return {
+            success: false,
+            message:
+                error.response?.data?.error ||
+                "Erreur lors du changement de mot de passe",
+        };
+    }
+};
+
 export const getMyPenalties = async (): Promise<PenaltiesResponse> => {
     try {
         const { data } = await apiClient.get(`${V1}/penalties`);
diff --git a/mobile/src/api/api_types.ts b/mobile/src/api/api_types.ts
index 553a0c8d..847c3ebb 100644
--- a/mobile/src/api/api_types.ts
+++ b/mobile/src/api/api_types.ts
@@ -37,6 +37,7 @@ export interface UserResponse {
     point?: number;
     point_zipette?: number; // ✅ AJOUTER CETTE LIGNE
     amende?: number;
+    must_change_password?: boolean;
 }
 
 /**
diff --git a/mobile/src/auth/AuthContext.tsx b/mobile/src/auth/AuthContext.tsx
index c373c9ff..f2d38f13 100644
--- a/mobile/src/auth/AuthContext.tsx
+++ b/mobile/src/auth/AuthContext.tsx
@@ -17,12 +17,14 @@ interface AuthState {
   role: UserRole;
   isLoading: boolean;
   isAuthenticated: boolean;
+  mustChangePassword: boolean;
 }
 
 interface AuthContextType extends AuthState {
-  loginClient: (token: string) => Promise<void>;
+  loginClient: (token: string, mustChangePassword?: boolean) => Promise<void>;
   loginAdmin: (token: string, role: 'admin' | 'cabine' | 'livreur') => Promise<void>;
   logout: () => Promise<void>;
+  setMustChangePassword: (value: boolean) => void;
 }
 
 const AuthContext = createContext<AuthContextType | undefined>(undefined);
@@ -34,6 +36,7 @@ export function AuthProvider({ children }: { children: ReactNode }) {
     role: null,
     isLoading: true,
     isAuthenticated: false,
+    mustChangePassword: false,
   });
 
   // Restore session on mount
@@ -52,6 +55,7 @@ export function AuthProvider({ children }: { children: ReactNode }) {
               role: 'client',
               isLoading: false,
               isAuthenticated: true,
+              mustChangePassword: false,
             });
             return;
           }
@@ -65,6 +69,7 @@ export function AuthProvider({ children }: { children: ReactNode }) {
               role: savedRole as UserRole,
               isLoading: false,
               isAuthenticated: true,
+              mustChangePassword: false,
             });
             return;
           }
@@ -78,6 +83,7 @@ export function AuthProvider({ children }: { children: ReactNode }) {
           role: null,
           isLoading: false,
           isAuthenticated: false,
+          mustChangePassword: false,
         });
       } catch {
         await clearAllAuth();
@@ -87,6 +93,7 @@ export function AuthProvider({ children }: { children: ReactNode }) {
           role: null,
           isLoading: false,
           isAuthenticated: false,
+          mustChangePassword: false,
         });
       }
     };
@@ -94,7 +101,7 @@ export function AuthProvider({ children }: { children: ReactNode }) {
     restore();
   }, []);
 
-  const loginClient = async (token: string) => {
+  const loginClient = async (token: string, mustChangePassword = false) => {
     const uname = extractUsernameFromToken(token);
     await storeToken(token);
     if (uname) await setUsername(uname);
@@ -105,9 +112,14 @@ export function AuthProvider({ children }: { children: ReactNode }) {
       role: 'client',
       isLoading: false,
       isAuthenticated: true,
+      mustChangePassword,
     });
   };
 
+  const setMustChangePassword = (value: boolean) => {
+    setState(prev => ({ ...prev, mustChangePassword: value }));
+  };
+
   const loginAdmin = async (token: string, role: 'admin' | 'cabine' | 'livreur') => {
     const uname = extractUsernameFromToken(token);
     await storeAdminToken(token);
@@ -130,11 +142,12 @@ export function AuthProvider({ children }: { children: ReactNode }) {
       role: null,
       isLoading: false,
       isAuthenticated: false,
+      mustChangePassword: false,
     });
   };
 
   return (
-    <AuthContext.Provider value={{ ...state, loginClient, loginAdmin, logout }}>
+    <AuthContext.Provider value={{ ...state, loginClient, loginAdmin, logout, setMustChangePassword }}>
       {children}
     </AuthContext.Provider>
   );
diff --git a/mobile/src/navigation/types.ts b/mobile/src/navigation/types.ts
index a02c56fb..6635c2b6 100644
--- a/mobile/src/navigation/types.ts
+++ b/mobile/src/navigation/types.ts
@@ -5,6 +5,10 @@ export type RootStackParamList = {
     role: undefined;
 };
 
+export type ChangePasswordStackParamList = {
+    ChangePassword: undefined;
+};
+
 export type AuthStackParamList = {
     RoleSelect: undefined;
     ClientLogin: undefined;
diff --git a/mobile/src/screens/auth/ChangePasswordScreen.tsx b/mobile/src/screens/auth/ChangePasswordScreen.tsx
new file mode 100644
index 00000000..0b6ab3aa
--- /dev/null
+++ b/mobile/src/screens/auth/ChangePasswordScreen.tsx
@@ -0,0 +1,191 @@
+import React, { useState } from "react";
+import {
+    View,
+    Text,
+    TextInput,
+    TouchableOpacity,
+    StyleSheet,
+    Alert,
+    ActivityIndicator,
+} from "react-native";
+import { Feather } from "@expo/vector-icons";
+import { useAuth } from "../../auth/AuthContext";
+import { useTheme } from "../../context/ThemeContext";
+import { changePassword } from "../../api/api";
+
+export default function ChangePasswordScreen() {
+    const { setMustChangePassword } = useAuth();
+    const { colors } = useTheme();
+
+    const [currentPassword, setCurrentPassword] = useState("");
+    const [newPassword, setNewPassword] = useState("");
+    const [confirmPassword, setConfirmPassword] = useState("");
+    const [showCurrent, setShowCurrent] = useState(false);
+    const [showNew, setShowNew] = useState(false);
+    const [showConfirm, setShowConfirm] = useState(false);
+    const [loading, setLoading] = useState(false);
+
+    const handleChangePassword = async () => {
+        if (!currentPassword || !newPassword || !confirmPassword) {
+            Alert.alert("Erreur", "Veuillez remplir tous les champs");
+            return;
+        }
+        if (newPassword.length < 8) {
+            Alert.alert(
+                "Erreur",
+                "Le nouveau mot de passe doit contenir au moins 8 caractères",
+            );
+            return;
+        }
+        if (newPassword !== confirmPassword) {
+            Alert.alert("Erreur", "Les nouveaux mots de passe ne correspondent pas");
+            return;
+        }
+
+        setLoading(true);
+        try {
+            const result = await changePassword(currentPassword, newPassword);
+            if (result.success) {
+                setMustChangePassword(false);
+            } else {
+                Alert.alert("Erreur", result.message || "Erreur inattendue");
+            }
+        } finally {
+            setLoading(false);
+        }
+    };
+
+    return (
+        <View style={[styles.container, { backgroundColor: colors.bgPrimary }]}>
+            <View style={styles.iconWrapper}>
+                <Feather name="lock" size={48} color="#7c3aed" />
+            </View>
+            <Text style={[styles.title, { color: colors.textPrimary }]}>
+                Changez votre mot de passe
+            </Text>
+            <Text style={[styles.subtitle, { color: colors.textSecondary }]}>
+                Pour accéder à l'application, vous devez définir un nouveau mot de
+                passe personnel.
+            </Text>
+
+            <View style={[styles.inputWrapper, { backgroundColor: colors.bgSecondary, borderColor: colors.border }]}>
+                <Feather name="lock" size={18} color={colors.textMuted} style={styles.inputIcon} />
+                <TextInput
+                    style={[styles.input, { color: colors.textPrimary }]}
+                    placeholder="Mot de passe actuel"
+                    placeholderTextColor={colors.textMuted}
+                    secureTextEntry={!showCurrent}
+                    value={currentPassword}
+                    onChangeText={setCurrentPassword}
+                    autoCapitalize="none"
+                    autoCorrect={false}
+                />
+                <TouchableOpacity onPress={() => setShowCurrent(!showCurrent)}>
+                    <Feather name={showCurrent ? "eye-off" : "eye"} size={18} color={colors.textMuted} />
+                </TouchableOpacity>
+            </View>
+
+            <View style={[styles.inputWrapper, { backgroundColor: colors.bgSecondary, borderColor: colors.border }]}>
+                <Feather name="key" size={18} color={colors.textMuted} style={styles.inputIcon} />
+                <TextInput
+                    style={[styles.input, { color: colors.textPrimary }]}
+                    placeholder="Nouveau mot de passe (min. 8 car.)"
+                    placeholderTextColor={colors.textMuted}
+                    secureTextEntry={!showNew}
+                    value={newPassword}
+                    onChangeText={setNewPassword}
+                    autoCapitalize="none"
+                    autoCorrect={false}
+                />
+                <TouchableOpacity onPress={() => setShowNew(!showNew)}>
+                    <Feather name={showNew ? "eye-off" : "eye"} size={18} color={colors.textMuted} />
+                </TouchableOpacity>
+            </View>
+
+            <View style={[styles.inputWrapper, { backgroundColor: colors.bgSecondary, borderColor: colors.border }]}>
+                <Feather name="check-circle" size={18} color={colors.textMuted} style={styles.inputIcon} />
+                <TextInput
+                    style={[styles.input, { color: colors.textPrimary }]}
+                    placeholder="Confirmer le nouveau mot de passe"
+                    placeholderTextColor={colors.textMuted}
+                    secureTextEntry={!showConfirm}
+                    value={confirmPassword}
+                    onChangeText={setConfirmPassword}
+                    autoCapitalize="none"
+                    autoCorrect={false}
+                />
+                <TouchableOpacity onPress={() => setShowConfirm(!showConfirm)}>
+                    <Feather name={showConfirm ? "eye-off" : "eye"} size={18} color={colors.textMuted} />
+                </TouchableOpacity>
+            </View>
+
+            <TouchableOpacity
+                style={[styles.button, loading && styles.buttonDisabled]}
+                onPress={handleChangePassword}
+                disabled={loading}
+            >
+                {loading ? (
+                    <ActivityIndicator color="#fff" />
+                ) : (
+                    <Text style={styles.buttonText}>Confirmer</Text>
+                )}
+            </TouchableOpacity>
+        </View>
+    );
+}
+
+const styles = StyleSheet.create({
+    container: {
+        flex: 1,
+        padding: 24,
+        justifyContent: "center",
+    },
+    iconWrapper: {
+        alignItems: "center",
+        marginBottom: 16,
+    },
+    title: {
+        fontSize: 22,
+        fontWeight: "bold",
+        marginBottom: 10,
+        textAlign: "center",
+    },
+    subtitle: {
+        fontSize: 14,
+        marginBottom: 32,
+        textAlign: "center",
+        lineHeight: 20,
+    },
+    inputWrapper: {
+        flexDirection: "row",
+        alignItems: "center",
+        borderWidth: 1,
+        borderRadius: 8,
+        paddingHorizontal: 12,
+        height: 50,
+        marginBottom: 14,
+    },
+    inputIcon: {
+        marginRight: 8,
+    },
+    input: {
+        flex: 1,
+        fontSize: 15,
+    },
+    button: {
+        backgroundColor: "#7c3aed",
+        height: 50,
+        borderRadius: 8,
+        justifyContent: "center",
+        alignItems: "center",
+        marginTop: 8,
+    },
+    buttonDisabled: {
+        opacity: 0.7,
+    },
+    buttonText: {
+        color: "#fff",
+        fontSize: 16,
+        fontWeight: "600",
+    },
+});
diff --git a/mobile/src/screens/auth/ClientLoginScreen.tsx b/mobile/src/screens/auth/ClientLoginScreen.tsx
index 2fb54092..ee7ce245 100644
--- a/mobile/src/screens/auth/ClientLoginScreen.tsx
+++ b/mobile/src/screens/auth/ClientLoginScreen.tsx
@@ -60,7 +60,7 @@ const LoginClient = () => {
                 formData.password,
             );
             if (result.success && result.access_token) {
-                await loginClient(result.access_token);
+                await loginClient(result.access_token, result.user?.must_change_password ?? false);
             } else {
                 const errorMessage =
                     result.message || "Identifiants incorrects";