diff --git a/src/provider/Provider.ts b/src/provider/Provider.ts
index af745e85..867e2c92 100644
--- a/src/provider/Provider.ts
+++ b/src/provider/Provider.ts
@@ -232,7 +232,7 @@ export class Provider {
     getMethod: any,
     userCustomParameters?: UserCustomParameters,
     computeEnv?: string,
-    validUntil?: string
+    validUntil?: number
   ): Promise<ProviderInitialize> {
     const providerEndpoints = await this.getEndpoints(providerUri)
     const serviceEndpoints = await this.getServiceEndpoints(
diff --git a/test/integration/ComputeFlow.test.ts b/test/integration/ComputeFlow.test.ts
index d857aa76..6c89b3dd 100644
--- a/test/integration/ComputeFlow.test.ts
+++ b/test/integration/ComputeFlow.test.ts
@@ -293,7 +293,7 @@ describe('Simple compute tests', async () => {
       crossFetchGeneric,
       null,
       'env1',
-      providerValidUntil.toString()
+      providerValidUntil.getTime()
     )
     console.log('initializeData', initializeData)
     const providerDatasetFees: ProviderFees = {