diff --git a/packages/cli/src/Server.ts b/packages/cli/src/Server.ts
index 60edd4d86c..20987c08c0 100644
--- a/packages/cli/src/Server.ts
+++ b/packages/cli/src/Server.ts
@@ -916,7 +916,7 @@ class App {
 				returnData.push(
 					{
 						idActive: data.id.toString(),
-						workflowId: data.workflowId,
+						workflowId: data.workflowId.toString(),
 						mode: data.mode,
 						retryOf: data.retryOf,
 						startedAt: new Date(data.startedAt),