diff --git a/index.js b/index.js
index 4d3bf3e..04571ea 100644
--- a/index.js
+++ b/index.js
@@ -29,7 +29,10 @@ var defaults = {
   tableCell: empty,
   definition: empty,
   yaml: empty,
-  toml: empty
+  toml: empty,
+
+  footnoteReference: empty,
+  footnoteDefinition: empty
 }
 
 var own = {}.hasOwnProperty
diff --git a/package.json b/package.json
index 4114b37..3af20f5 100644
--- a/package.json
+++ b/package.json
@@ -38,6 +38,8 @@
     "prettier": "^2.0.0",
     "remark": "^13.0.0",
     "remark-cli": "^9.0.0",
+    "remark-footnotes": "^3.0.0",
+    "remark-gfm": "^1.0.0",
     "remark-preset-wooorm": "^8.0.0",
     "tape": "^5.0.0",
     "tinyify": "^3.0.0",
diff --git a/test.js b/test.js
index 0c2bf16..e3bacf5 100644
--- a/test.js
+++ b/test.js
@@ -2,11 +2,19 @@
 
 var test = require('tape')
 var remark = require('remark')
+var gfm = require('remark-gfm')
+var footnotes = require('remark-footnotes')
 var u = require('unist-builder')
 var strip = require('.')
 
 function proc(value, options) {
-  return remark().use(strip, options).processSync(value).toString().trimEnd()
+  return remark()
+    .use(gfm)
+    .use(footnotes)
+    .use(strip, options)
+    .processSync(value)
+    .toString()
+    .trimEnd()
 }
 
 test('stripMarkdown()', function (t) {
@@ -39,8 +47,7 @@ test('stripMarkdown()', function (t) {
   t.equal(proc('_Alfred_'), 'Alfred', 'emphasis (2)')
   t.equal(proc('**Alfred**'), 'Alfred', 'importance (1)')
   t.equal(proc('__Alfred__'), 'Alfred', 'importance (2)')
-  // To do: add `remark-gfm` when that’s done.
-  // t.equal(proc('~~Alfred~~'), 'Alfred', 'strikethrough')
+  t.equal(proc('~~Alfred~~'), 'Alfred', 'strikethrough')
   t.equal(proc('`Alfred`'), 'Alfred', 'inline code')
   t.equal(proc('[Hello](world)'), 'Hello', 'link')
   t.equal(proc('[**H**ello](world)'), 'Hello', 'importance in link')
@@ -77,8 +84,7 @@ test('stripMarkdown()', function (t) {
   t.equal(proc('---'), '', 'thematic break')
   t.equal(proc('A  \nB'), 'A\nB', 'hard line break')
   t.equal(proc('A\nB'), 'A\nB', 'soft line break')
-  // To do: add `remark-gfm` when that’s done.
-  // t.equal(proc('| A | B |\n| - | - |\n| C | D |'), '', 'table')
+  t.equal(proc('| A | B |\n| - | - |\n| C | D |'), '', 'table')
   t.equal(proc('\talert("hello");'), '', 'code (1)')
   t.equal(proc('```js\nconsole.log("world");\n```'), '', 'code (2)')
   t.equal(proc('<sup>Hello</sup>'), 'Hello', 'html (1)')
@@ -89,6 +95,8 @@ test('stripMarkdown()', function (t) {
     'html (3)'
   )
 
+  t.equal(proc('Hello[^1]\n\n[^1]: World'), 'Hello', 'footnote')
+
   // "keep" option
   t.equal(
     proc('- **Hello**\n\n- World!', {keep: []}),
diff --git a/types/index.d.ts b/types/index.d.ts
index 72986c2..ac5175b 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -31,6 +31,8 @@ declare namespace strip {
       | 'definition'
       | 'yaml'
       | 'toml'
+      | 'footnoteReference'
+      | 'footnoteDefinition'
     >
   }
 }