diff --git a/packages/w3s-web-core-sdk/src/__tests__/providers/eip-1193/provider.test.ts b/packages/w3s-web-core-sdk/src/__tests__/providers/eip-1193/provider.test.ts
index b5f01da..21a3bab 100644
--- a/packages/w3s-web-core-sdk/src/__tests__/providers/eip-1193/provider.test.ts
+++ b/packages/w3s-web-core-sdk/src/__tests__/providers/eip-1193/provider.test.ts
@@ -198,13 +198,19 @@ describe('Providers > eip-1193 > EIP1193Provider > rpc methods', () => {
       method: 'personal_sign',
       params: PersonalSignParams,
     }
+    const signMessageSpy = jest.spyOn(account, 'signMessage')
 
     const response = await provider.request<
       string,
       typeof PersonalSignResponse
     >(mockPayload)
 
+    expect(signMessageSpy).toHaveBeenCalledWith({
+      message: { raw: PersonalSignParams[0] },
+    })
     expect(response).toEqual(PersonalSignResponse)
+
+    signMessageSpy.mockRestore()
   })
 
   it('should throw an error when the to parameter is not provided for eth_sendTransaction', async () => {
diff --git a/packages/w3s-web-core-sdk/src/providers/eip-1193/provider.ts b/packages/w3s-web-core-sdk/src/providers/eip-1193/provider.ts
index 0b1c10a..fd082d5 100644
--- a/packages/w3s-web-core-sdk/src/providers/eip-1193/provider.ts
+++ b/packages/w3s-web-core-sdk/src/providers/eip-1193/provider.ts
@@ -76,7 +76,7 @@ export default class EIP1193Provider<
         await this.validateAddress(address)
 
         const result = await this.bundlerClient.account!.signMessage({
-          message: challenge,
+          message: { raw: challenge },
         })
 
         return this.getResponse(result, payload)