diff --git a/imago-admin/src/pages/admin/ClientDetail.tsx b/imago-admin/src/pages/admin/ClientDetail.tsx
index 0873106..85bc655 100644
--- a/imago-admin/src/pages/admin/ClientDetail.tsx
+++ b/imago-admin/src/pages/admin/ClientDetail.tsx
@@ -1,18 +1,49 @@
+import { useState } from 'react';
 import { useParams, Link } from 'react-router-dom';
 import { PageLayout } from '@/components/layout/PageLayout';
 import { PlanBadge } from '@/components/shared/PlanBadge';
 import { QuotaBar } from '@/components/shared/QuotaBar';
 import { StatusBadge } from '@/components/shared/StatusBadge';
 import { CardSkeleton } from '@/components/shared/Skeleton';
-import { useClient } from '@/hooks/useClients';
+import { toast } from '@/components/shared/Toast';
+import { useClient, useUpdateClient } from '@/hooks/useClients';
 import { useImages } from '@/hooks/useImages';
 import { formatDate, formatTokens, formatMB } from '@/utils/formatters';
-import { ArrowLeft, Images, ExternalLink } from 'lucide-react';
+import { PLANS, SCOPES } from '@/utils/constants';
+import { ArrowLeft, Images, ExternalLink, Edit3, X, Loader2, Save } from 'lucide-react';
+import type { Plan, APIClientUpdate } from '@/types/api.types';
 
 export default function ClientDetail() {
     const { id } = useParams<{ id: string }>();
     const { data: client, isLoading } = useClient(id);
     const { data: clientImages } = useImages({ client_id: id, page_size: 20, sort_order: 'desc' });
+    const updateClientMut = useUpdateClient();
+
+    const [showEdit, setShowEdit] = useState(false);
+    const [editScopes, setEditScopes] = useState<string[]>([]);
+    const [editPlan, setEditPlan] = useState<Plan>('free');
+
+    const openEdit = () => {
+        if (!client) return;
+        setEditScopes([...client.scopes]);
+        setEditPlan(client.plan);
+        setShowEdit(true);
+    };
+
+    const handleSave = async () => {
+        if (!client) return;
+        const data: APIClientUpdate = {
+            scopes: editScopes,
+            plan: editPlan,
+        };
+        try {
+            await updateClientMut.mutateAsync({ id: client.id, data });
+            toast('success', 'Client mis à jour');
+            setShowEdit(false);
+        } catch {
+            toast('error', 'Erreur lors de la mise à jour');
+        }
+    };
 
     if (isLoading) {
         return (
@@ -46,6 +77,9 @@ export default function ClientDetail() {
                     <span className={`badge ${client.is_active ? 'bg-status-ok/20 text-status-ok' : 'bg-content-muted/20 text-content-muted'}`}>
                         {client.is_active ? 'Actif' : 'Inactif'}
                     </span>
+                    <button onClick={openEdit} className="btn-ghost text-sm flex items-center gap-1 text-brand-400 hover:text-brand-300">
+                        <Edit3 size={14} /> Éditer
+                    </button>
                     <Link to="/admin/clients" className="btn-ghost text-sm flex items-center gap-1">
                         <ArrowLeft size={14} /> Retour
                     </Link>
@@ -82,7 +116,12 @@ export default function ClientDetail() {
 
             {/* Scopes */}
             <div className="card mb-8">
-                <h3 className="text-sm font-semibold text-content-secondary mb-3">Scopes accordés</h3>
+                <div className="flex items-center justify-between mb-3">
+                    <h3 className="text-sm font-semibold text-content-secondary">Scopes accordés</h3>
+                    <button onClick={openEdit} className="text-xs text-brand-400 hover:text-brand-300 flex items-center gap-1">
+                        <Edit3 size={12} /> Modifier
+                    </button>
+                </div>
                 <div className="flex flex-wrap gap-2">
                     {client.scopes.map((scope) => (
                         <span key={scope} className="badge bg-brand-500/10 text-brand-400 font-mono text-xs">
@@ -137,6 +176,65 @@ export default function ClientDetail() {
                     </div>
                 )}
             </div>
+
+            {/* Edit modal */}
+            {showEdit && (
+                <div className="fixed inset-0 z-50 flex justify-end">
+                    <div className="absolute inset-0 bg-black/60 backdrop-blur-sm" onClick={() => setShowEdit(false)} />
+                    <div className="relative w-full max-w-md bg-surface-raised border-l border-border h-full overflow-y-auto animate-slide-in">
+                        <div className="sticky top-0 bg-surface-raised border-b border-border p-4 flex items-center justify-between">
+                            <h2 className="text-lg font-semibold">Éditer {client.name}</h2>
+                            <button onClick={() => setShowEdit(false)} className="p-1 rounded hover:bg-surface-overlay text-content-muted">
+                                <X size={18} />
+                            </button>
+                        </div>
+                        <div className="p-6 space-y-5">
+                            <div>
+                                <label className="block text-sm font-medium text-content-secondary mb-1">Plan</label>
+                                <select
+                                    value={editPlan}
+                                    onChange={(e) => setEditPlan(e.target.value as Plan)}
+                                    className="input-field w-full"
+                                >
+                                    <option value="free">Free</option>
+                                    <option value="standard">Standard</option>
+                                    <option value="premium">Premium</option>
+                                </select>
+                                <p className="text-xs text-content-muted mt-1">
+                                    {PLANS[editPlan].images === Infinity ? '∞' : PLANS[editPlan].images} images · {formatMB(PLANS[editPlan].storageMb)} · {formatTokens(PLANS[editPlan].aiTokens)} tokens
+                                </p>
+                            </div>
+                            <div>
+                                <label className="block text-sm font-medium text-content-secondary mb-1">Scopes</label>
+                                <div className="space-y-2">
+                                    {SCOPES.map((scope) => (
+                                        <label key={scope} className="flex items-center gap-2 cursor-pointer">
+                                            <input
+                                                type="checkbox"
+                                                checked={editScopes.includes(scope)}
+                                                onChange={(e) => {
+                                                    if (e.target.checked) setEditScopes([...editScopes, scope]);
+                                                    else setEditScopes(editScopes.filter((s) => s !== scope));
+                                                }}
+                                                className="rounded border-border bg-surface text-brand-500 focus:ring-brand-500"
+                                            />
+                                            <span className="text-sm text-content-secondary font-mono">{scope}</span>
+                                        </label>
+                                    ))}
+                                </div>
+                            </div>
+                            <button
+                                onClick={handleSave}
+                                disabled={updateClientMut.isPending}
+                                className="btn-primary w-full flex items-center justify-center gap-2"
+                            >
+                                {updateClientMut.isPending ? <Loader2 size={16} className="animate-spin" /> : <Save size={16} />}
+                                Enregistrer
+                            </button>
+                        </div>
+                    </div>
+                </div>
+            )}
         </PageLayout>
     );
 }
diff --git a/imago-admin/src/utils/constants.ts b/imago-admin/src/utils/constants.ts
index ed2f29e..e03eb9f 100644
--- a/imago-admin/src/utils/constants.ts
+++ b/imago-admin/src/utils/constants.ts
@@ -48,6 +48,7 @@ export const PLANS = {
 export const SCOPES = [
     'images:read',
     'images:write',
+    'images:delete',
     'ai:use',
     'admin',
 ] as const;