diff --git a/index.js b/index.js
index 8038c7a..79cd02f 100644
--- a/index.js
+++ b/index.js
@@ -38,11 +38,17 @@ export function gfm(options) {
   ])
 }
 
-/** @type {HtmlExtension} */
-export const gfmHtml = combineHtmlExtensions([
-  gfmAutolinkLiteralHtml,
-  gfmStrikethroughHtml,
-  gfmTableHtml,
-  gfmTagfilterHtml,
-  gfmTaskListItemHtml
-])
+/**
+ * Support to compile GFM to HTML.
+ *
+ * @returns {HtmlExtension}
+ */
+export function gfmHtml() {
+  return combineHtmlExtensions([
+    gfmAutolinkLiteralHtml,
+    gfmStrikethroughHtml,
+    gfmTableHtml,
+    gfmTagfilterHtml,
+    gfmTaskListItemHtml
+  ])
+}
diff --git a/readme.md b/readme.md
index d2e542c..24bfe5f 100644
--- a/readme.md
+++ b/readme.md
@@ -84,7 +84,7 @@ import {gfm, gfmHtml} from 'micromark-extension-gfm'
 const output = micromark(fs.readFileSync('example.md'), {
   allowDangerousHtml: true,
   extensions: [gfm()],
-  htmlExtensions: [gfmHtml]
+  htmlExtensions: [gfmHtml()]
 })
 
 console.log(output)
@@ -130,8 +130,8 @@ There is no default export.
 Support [GFM][] or markdown on github.com.
 `gfm` is a function that can be called with options and returns an extension for
 micromark to parse GFM (can be passed in `extensions`).
-`gfmHtml` is an extension for micromark to compile as elements (can be passed in
-`htmlExtensions`).
+`gfmHtml` is a function that can be called and returns an extension for
+micromark to compile as elements (can be passed in `htmlExtensions`).
 
 ##### `options`
 
diff --git a/test/index.js b/test/index.js
index 7511bf2..b0b990e 100644
--- a/test/index.js
+++ b/test/index.js
@@ -12,7 +12,7 @@ test('markdown -> html (micromark)', (t) => {
         allowDangerousHtml: true,
         allowDangerousProtocol: true,
         extensions: [gfm({singleTilde: false})],
-        htmlExtensions: [gfmHtml]
+        htmlExtensions: [gfmHtml()]
       }),
       spec[index].output,
       spec[index].category + ' (' + index + ')'