diff --git a/types/dwt/Dynamsoft.d.ts b/types/dwt/Dynamsoft.d.ts
index ac2c7c8fb3..8ed3e24688 100644
--- a/types/dwt/Dynamsoft.d.ts
+++ b/types/dwt/Dynamsoft.d.ts
@@ -3812,6 +3812,14 @@ interface WebTwain {
      */
     UnregisterEvent(name: string, evt: object): boolean;
 
+	TagImages(aryImageIndices: number[], tagName: string): boolean;
+	
+    SetDefaultTag(tagName: string): boolean;
+	
+    ClearImageTags(sImageIndex: number): boolean;
+	
+    FilterImagesByTag(tagName: string): boolean;
+	
     /*ignored
     checkErrorString
     first
diff --git a/types/dwt/index.d.ts b/types/dwt/index.d.ts
index 242ef5ec3e..a959cc1699 100644
--- a/types/dwt/index.d.ts
+++ b/types/dwt/index.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for dwt 15.1
+// Type definitions for dwt 15.2
 // Project: https://www.dynamsoft.com/products/webtwain_overview.aspx
 // Definitions by: Xiao Ling <https://github.com/yushulx>
 //                 Josh Hall <https://github.com/jbh>
@@ -23,7 +23,7 @@
 *
 * Copyright 2019, Dynamsoft Corporation
 * Author: Dynamsoft Support Team
-* Version: 15.1
+* Version: 15.2
 */
 
 declare const Dynamsoft: DynamsoftStatic;