diff --git a/packages/page-bounties/src/Bounties.tsx b/packages/page-bounties/src/Bounties.tsx
index 91b361cbbe..57b0f9f98a 100644
--- a/packages/page-bounties/src/Bounties.tsx
+++ b/packages/page-bounties/src/Bounties.tsx
@@ -41,13 +41,13 @@ function Bounties (): React.ReactElement {
         empty={deriveBounties && t<string>('No open bounties')}
         header={headerRef.current}
       >
-        {deriveBounties && bestNumber && deriveBounties.map(({ bounty, description }, index) => (
+        {deriveBounties && bestNumber && deriveBounties.map(({ bounty, description, index }) => (
           <Bounty
             bestNumber={bestNumber}
             bounty={bounty}
             description={description}
             index={index}
-            key={index}
+            key={index.toNumber()}
           />
         ))}
       </Table>