diff --git a/client/src/pages/DsiOpex.tsx b/client/src/pages/DsiOpex.tsx
index 18c03dc..6a10ac2 100644
--- a/client/src/pages/DsiOpex.tsx
+++ b/client/src/pages/DsiOpex.tsx
@@ -1082,10 +1082,10 @@ export default function DsiOpex() {
                 </div>
               )}
 
-              <div className="bg-card border border-border rounded-xl overflow-hidden">
+              <div className="bg-card border border-border rounded-xl overflow-hidden" style={{ maxHeight: 'calc(100vh - 340px)', overflowY: 'auto' }}>
                 <table className="w-full text-sm">
                   <thead>
-                    <tr className="border-b border-border bg-muted/40">
+                    <tr className="border-b border-border" style={{ position: 'sticky', top: 0, zIndex: 20, background: 'oklch(0.94 0.005 80)' }}>
                       <th className="text-left px-4 py-3 font-medium text-muted-foreground w-8">#</th>
                       <th className="text-left px-4 py-3 font-medium text-muted-foreground">
                         <SortBtn col="libelle" label="Poste de charge" />