diff --git a/packages/core-web/src/FedimintWallet.ts b/packages/core-web/src/FedimintWallet.ts
index ab2de2a..d43ff9c 100644
--- a/packages/core-web/src/FedimintWallet.ts
+++ b/packages/core-web/src/FedimintWallet.ts
@@ -1,4 +1,4 @@
-import { WorkerClient } from './worker/WorkerClient'
+import { WorkerClient, WorkerMessageType } from './worker'
 import {
   BalanceService,
   MintService,
@@ -85,9 +85,12 @@ export class FedimintWallet {
     await this._client.initialize()
     // TODO: Determine if this should be safe or throw
     if (this._isOpen) throw new Error('The FedimintWallet is already open.')
-    const { success } = await this._client.sendSingleMessage('open', {
-      clientName,
-    })
+    const { success } = await this._client.sendSingleMessage(
+      WorkerMessageType.Open,
+      {
+        clientName,
+      },
+    )
     if (success) {
       this._isOpen = !!success
       this._resolveOpen()
@@ -105,10 +108,13 @@ export class FedimintWallet {
       throw new Error(
         'The FedimintWallet is already open. You can only call `joinFederation` on closed clients.',
       )
-    const response = await this._client.sendSingleMessage('join', {
-      inviteCode,
-      clientName,
-    })
+    const response = await this._client.sendSingleMessage(
+      WorkerMessageType.Join,
+      {
+        inviteCode,
+        clientName,
+      },
+    )
     if (response.success) {
       this._isOpen = true
       this._resolveOpen()