diff --git a/en/use-dify/getting-started/key-concepts.mdx b/en/use-dify/getting-started/key-concepts.mdx
index 293cf533..7365b2dd 100644
--- a/en/use-dify/getting-started/key-concepts.mdx
+++ b/en/use-dify/getting-started/key-concepts.mdx
@@ -83,7 +83,7 @@ Additionally, the User Input node comes with a set of input variables that you c
     | `sys.app_id` | String | App ID: A unique identifier automatically assigned by the system to each App. This parameter is used to record the basic information of the current application. | This parameter is used to differentiate and locate distinct Workflow applications for users with development capabilities. |
     | `sys.workflow_id` | String | Workflow ID: This parameter records information about all nodes information in the current Workflow application. | This parameter can be used by users with development capabilities to track and record information about the nodes contained within a Workflow. |
     | `sys.workflow_run_id` | String | Workflow Run ID: Used to record the runtime status and execution logs of a Workflow application. | This parameter can be used by users with development capabilities to track the application's historical execution records. |
-    | `sys.timestamp` | String | The start time of each workflow execution. | |
+    | `sys.timestamp` | Number | The start time of each workflow execution. | |
 
   </Tab>
   <Tab title="Chatflow">