diff --git a/src/entities/weth9.ts b/src/entities/weth9.ts
index 9558f922..abaf3f8e 100644
--- a/src/entities/weth9.ts
+++ b/src/entities/weth9.ts
@@ -12,6 +12,7 @@ export const WETH9: { [chainId: number]: Token } = {
 
   [10]: new Token(10, '0x4200000000000000000000000000000000000006', 18, 'WETH', 'Wrapped Ether'),
   [69]: new Token(69, '0x4200000000000000000000000000000000000006', 18, 'WETH', 'Wrapped Ether'),
+  [11155420]: new Token(11155420, '0x4200000000000000000000000000000000000006', 18, 'WETH', 'Wrapped Ether'),
 
   [42161]: new Token(42161, '0x82aF49447D8a07e3bd95BD0d56f35241523fBab1', 18, 'WETH', 'Wrapped Ether'),
   [421611]: new Token(421611, '0xB47e6A5f8b33b3F17603C83a0535A9dcD7E32681', 18, 'WETH', 'Wrapped Ether'),