diff --git a/ui/lib/network-id.test.ts b/ui/lib/network-id.test.ts
index 2ae9ce7..f3087a6 100644
--- a/ui/lib/network-id.test.ts
+++ b/ui/lib/network-id.test.ts
@@ -6,6 +6,11 @@ test("networkToId goerli", () => {
   expect(actual).toBe(5)
 })
 
+test("networkToId sepolia", () => {
+  const actual = networkToId('sepolia')
+  expect(actual).toBe(11155111)
+})
+
 test("networkToId mainnet", () => {
   const actual = networkToId('mainnet')
   expect(actual).toBe(1)
diff --git a/ui/lib/network-id.ts b/ui/lib/network-id.ts
index 4a1e743..9b45041 100644
--- a/ui/lib/network-id.ts
+++ b/ui/lib/network-id.ts
@@ -6,6 +6,8 @@ export function networkToId(network: any) {
       return 1
     case 'goerli':
       return 5
+    case 'sepolia':
+      return 11155111
     case 'local':
       return 31337
     default: