diff --git a/index.d.ts b/index.d.ts
index 44d8b68..e96d7e6 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -4,8 +4,9 @@ import {
   FontInfo,
   FontKey,
   AlibabaFontkitFontkitInterface,
+  GlyphBitmap,
 } from './pkg/interfaces/alibaba-fontkit-fontkit-interface';
 
 export import strWidthToNumber = AlibabaFontkitFontkitInterface.strWidthToNumber;
 export import numberWidthToStr = AlibabaFontkitFontkitInterface.numberWidthToStr;
-export { FontKit, Font, FontInfo, FontKey };
+export { FontKit, Font, FontInfo, FontKey, GlyphBitmap };
diff --git a/index.js b/index.js
index 99b4233..2cbc3ad 100644
--- a/index.js
+++ b/index.js
@@ -5,3 +5,4 @@ export const FontKit = fontkitInterface.FontKit;
 export const TextMetrics = fontkitInterface.TextMetrics;
 export const numberWidthToStr = fontkitInterface.numberWidthToStr;
 export const strWidthToNumber = fontkitInterface.strWidthToNumber;
+export const GlyphBitmap = fontkitInterface.GlyphBitmap;