diff --git a/package-lock.json b/package-lock.json
index e67f578..fadc610 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7,6 +7,9 @@
     "": {
       "version": "8.3.0",
       "license": "Unlicense",
+      "dependencies": {
+        "@types/markdown-it": "^12.2.1"
+      },
       "devDependencies": {
         "ava": "^3.15.0",
         "markdown-it": "*",
@@ -1278,6 +1281,26 @@
       "integrity": "sha512-EYNwp3bU+98cpU4lAWYYL7Zz+2gryWH1qbdDTidVd6hkiR6weksdbMadyXKXNPEkQFhXM+hVO9ZygomHXp+AIw==",
       "dev": true
     },
+    "node_modules/@types/linkify-it": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/@types/linkify-it/-/linkify-it-3.0.2.tgz",
+      "integrity": "sha512-HZQYqbiFVWufzCwexrvh694SOim8z2d+xJl5UNamcvQFejLY/2YUtzXHYi3cHdI7PMlS8ejH2slRAOJQ32aNbA=="
+    },
+    "node_modules/@types/markdown-it": {
+      "version": "12.2.1",
+      "resolved": "https://registry.npmjs.org/@types/markdown-it/-/markdown-it-12.2.1.tgz",
+      "integrity": "sha512-iij+ilRX/vxtUPCREjn74xzHo/RorHJDwOsJ6X+TgKw7zSvazhVXnDfwlTnyLOMdiVUjtRYU4CrcUZ7Aci4PmQ==",
+      "dependencies": {
+        "@types/linkify-it": "*",
+        "@types/mdurl": "*",
+        "highlight.js": "^10.7.2"
+      }
+    },
+    "node_modules/@types/mdurl": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/@types/mdurl/-/mdurl-1.0.2.tgz",
+      "integrity": "sha512-eC4U9MlIcu2q0KQmXszyn5Akca/0jrQmwDRgpAMJai7qBWq4amIQhZyNau4VYGtCeALvW1/NtjzJJ567aZxfKA=="
+    },
     "node_modules/@types/node": {
       "version": "13.13.5",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-13.13.5.tgz",
@@ -4703,6 +4726,14 @@
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       "dev": true
     },
+    "node_modules/highlight.js": {
+      "version": "10.7.3",
+      "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-10.7.3.tgz",
+      "integrity": "sha512-tzcUFauisWKNHaRkN4Wjl/ZA07gENAjFl3J/c480dprkGTg5EQstgaNFqBfUqCq54kZRIEcreTsAgF/m2quD7A==",
+      "engines": {
+        "node": "*"
+      }
+    },
     "node_modules/hosted-git-info": {
       "version": "2.8.5",
       "resolved": "https://registry.npmjs.org/hosted-git-info/-/hosted-git-info-2.8.5.tgz",
@@ -11879,6 +11910,26 @@
       "integrity": "sha512-EYNwp3bU+98cpU4lAWYYL7Zz+2gryWH1qbdDTidVd6hkiR6weksdbMadyXKXNPEkQFhXM+hVO9ZygomHXp+AIw==",
       "dev": true
     },
+    "@types/linkify-it": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/@types/linkify-it/-/linkify-it-3.0.2.tgz",
+      "integrity": "sha512-HZQYqbiFVWufzCwexrvh694SOim8z2d+xJl5UNamcvQFejLY/2YUtzXHYi3cHdI7PMlS8ejH2slRAOJQ32aNbA=="
+    },
+    "@types/markdown-it": {
+      "version": "12.2.1",
+      "resolved": "https://registry.npmjs.org/@types/markdown-it/-/markdown-it-12.2.1.tgz",
+      "integrity": "sha512-iij+ilRX/vxtUPCREjn74xzHo/RorHJDwOsJ6X+TgKw7zSvazhVXnDfwlTnyLOMdiVUjtRYU4CrcUZ7Aci4PmQ==",
+      "requires": {
+        "@types/linkify-it": "*",
+        "@types/mdurl": "*",
+        "highlight.js": "^10.7.2"
+      }
+    },
+    "@types/mdurl": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/@types/mdurl/-/mdurl-1.0.2.tgz",
+      "integrity": "sha512-eC4U9MlIcu2q0KQmXszyn5Akca/0jrQmwDRgpAMJai7qBWq4amIQhZyNau4VYGtCeALvW1/NtjzJJ567aZxfKA=="
+    },
     "@types/node": {
       "version": "13.13.5",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-13.13.5.tgz",
@@ -14624,6 +14675,11 @@
       "integrity": "sha512-l9sfDFsuqtOqKDsQdqrMRk0U85RZc0RtOR9yPI7mRVOa4FsR/BVnZ0shmQRM96Ji99kYZP/7hn1cedc1+ApsTQ==",
       "dev": true
     },
+    "highlight.js": {
+      "version": "10.7.3",
+      "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-10.7.3.tgz",
+      "integrity": "sha512-tzcUFauisWKNHaRkN4Wjl/ZA07gENAjFl3J/c480dprkGTg5EQstgaNFqBfUqCq54kZRIEcreTsAgF/m2quD7A=="
+    },
     "hosted-git-info": {
       "version": "2.8.5",
       "resolved": "https://registry.npmjs.org/hosted-git-info/-/hosted-git-info-2.8.5.tgz",
diff --git a/package.json b/package.json
index b151de6..2f027ef 100644
--- a/package.json
+++ b/package.json
@@ -48,5 +48,8 @@
   },
   "peerDependencies": {
     "markdown-it": "*"
+  },
+  "dependencies": {
+    "@types/markdown-it": "^12.2.1"
   }
 }
diff --git a/types/index.d.ts b/types/index.d.ts
index cfe50a8..7c74da2 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -1,6 +1,6 @@
-import MarkdownIt from 'markdown-it';
-import Token from 'markdown-it/lib/token';
-import State from 'markdown-it/lib/rules_core/state_core';
+import MarkdownIt = require('markdown-it');
+import Token = require('markdown-it/lib/token');
+import State = require('markdown-it/lib/rules_core/state_core');
 
 declare namespace anchor {
   export type RenderHref = (slug: string, state: State) => string;
@@ -62,4 +62,4 @@ declare namespace anchor {
 
 declare function anchor(md: MarkdownIt, opts?: anchor.AnchorOptions): void;
 
-export = anchor;
+export default anchor;