diff --git a/client/src/pages/DsiOpex.tsx b/client/src/pages/DsiOpex.tsx
index 6a10ac2..1666f84 100644
--- a/client/src/pages/DsiOpex.tsx
+++ b/client/src/pages/DsiOpex.tsx
@@ -1013,7 +1013,7 @@ export default function DsiOpex() {
         </div>
 
         {/* Contenu principal */}
-        <div className="flex-1 overflow-auto px-6 py-4">
+        <div className="flex-1 min-h-0 px-6 py-4 overflow-y-hidden">
 
           {/* === ÉTAT VIDE : année sans données === */}
           {opexState.lignes.length === 0 && (
@@ -1082,7 +1082,7 @@ export default function DsiOpex() {
                 </div>
               )}
 
-              <div className="bg-card border border-border rounded-xl overflow-hidden" style={{ maxHeight: 'calc(100vh - 340px)', overflowY: 'auto' }}>
+              <div className="bg-card border border-border rounded-xl" style={{ maxHeight: 'calc(100vh - 380px)', overflowY: 'auto', overflowX: 'auto' }}>
                 <table className="w-full text-sm">
                   <thead>
                     <tr className="border-b border-border" style={{ position: 'sticky', top: 0, zIndex: 20, background: 'oklch(0.94 0.005 80)' }}>