diff --git a/README.md b/README.md
index 0d0ba6b..5a7e265 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,12 @@ Changes the case of text selected, provided, or on the clipboard to UPPERCASE, l
 
 ![Screenshot](changecase.png)
 
+## 🔗 This workflow is converted from [alfred-workflow](https://github.com/gillibrand/alfred-change-case).
+
+* Note that there might be some code change or different actions from the original workflow.
+
+* Marked original workflow's creator to author.
+
 ## Install
 
 Download and double click `arvisworkflow` file
diff --git a/arvis-workflow.json b/arvis-workflow.json
index d982489..e318e50 100644
--- a/arvis-workflow.json
+++ b/arvis-workflow.json
@@ -1,5 +1,5 @@
 {
-  "$schema": "https://github.com/jopemachine/arvis-core/blob/master/workflow-schema.json",
+  "$schema": "https://raw.githubusercontent.com/jopemachine/arvis-extension-validator/master/workflow-schema.json",
   "category": "Tools",
   "creator": "Jay Gillibrand",
   "description": "Changes the case of text on the clipboard.",