diff --git a/e-voting-system/frontend/app/dashboard/blockchain/page.tsx b/e-voting-system/frontend/app/dashboard/blockchain/page.tsx
index e3832a4..1a472ab 100644
--- a/e-voting-system/frontend/app/dashboard/blockchain/page.tsx
+++ b/e-voting-system/frontend/app/dashboard/blockchain/page.tsx
@@ -94,7 +94,16 @@ export default function BlockchainPage() {
         }
 
         const data = await response.json()
-        setBlockchainData(data)
+        // Ensure blocks array exists
+        const blockchainData = {
+          blocks: data.blocks || [],
+          verification: data.verification || {
+            chain_valid: true,
+            total_blocks: 0,
+            total_votes: 0,
+          }
+        }
+        setBlockchainData(blockchainData)
       } catch (err) {
         const errorMessage = err instanceof Error ? err.message : "Erreur inconnue"
         setError(errorMessage)
@@ -266,7 +275,7 @@ export default function BlockchainPage() {
       )}
 
       {/* Empty State */}
-      {blockchainData && blockchainData.blocks.length === 0 && (
+      {blockchainData && blockchainData.blocks && blockchainData.blocks.length === 0 && (
         <Card>
           <CardContent className="pt-6 text-center py-12">
             <div className="text-5xl mb-4">⛓️</div>