diff --git a/src/methods/swap/swapTx.ts b/src/methods/swap/swapTx.ts
index e6989c59..22b60b6f 100644
--- a/src/methods/swap/swapTx.ts
+++ b/src/methods/swap/swapTx.ts
@@ -60,7 +60,7 @@ type SwapQueryParams = {
   /**
    * @description User's Wallet Address.
    */
-  userAddress?: string;
+  userAddress: string;
 
   /**
    * @description Dash (-) separated list of tokens (addresses or symbols from `/tokens`) to comprise the price route. _Max 4 tokens._ _**\*Note:**_ _If_ `_route_` _is specified, the response will only comprise of the route specified which might not be the optimal route._