diff --git a/src/hooks/useMaxInputBalance.ts b/src/hooks/useMaxInputBalance.ts
index c18230e75fa..9a243323193 100644
--- a/src/hooks/useMaxInputBalance.ts
+++ b/src/hooks/useMaxInputBalance.ts
@@ -17,7 +17,7 @@ export default function useMaxInputBalance() {
         l1GasFeeOptimism
       );
 
-      setMaxInputBalance(newInputBalance);
+      setMaxInputBalance(newInputBalance.toString());
       return newInputBalance;
     },
     [l1GasFeeOptimism, selectedGasFee]