diff --git a/.github/funding.yml b/.github/funding.yml
index 1a630e9..8ec4782 100644
--- a/.github/funding.yml
+++ b/.github/funding.yml
@@ -1,3 +1,4 @@
 github: sindresorhus
 open_collective: sindresorhus
+tidelift: npm/normalize-url
 custom: https://sindresorhus.com/donate
diff --git a/.github/security.md b/.github/security.md
new file mode 100644
index 0000000..5358dc5
--- /dev/null
+++ b/.github/security.md
@@ -0,0 +1,3 @@
+# Security Policy
+
+To report a security vulnerability, please use the [Tidelift security contact](https://tidelift.com/security). Tidelift will coordinate the fix and disclosure.
diff --git a/readme.md b/readme.md
index 3cc353e..4d9e5eb 100644
--- a/readme.md
+++ b/readme.md
@@ -27,7 +27,7 @@ normalizeUrl('HTTP://xn--xample-hva.com:80/?b=bar&a=foo');
 
 ## API
 
-### normalizeUrl(url, [options])
+### normalizeUrl(url, options?)
 
 #### url
 
@@ -37,7 +37,7 @@ URL to normalize.
 
 #### options
 
-Type: `Object`
+Type: `object`
 
 ##### defaultProtocol
 
@@ -219,6 +219,14 @@ normalizeUrl('www.sindresorhus.com?b=two&a=one&c=three', {
 - [compare-urls](https://github.com/sindresorhus/compare-urls) - Compare URLs by first normalizing them
 
 
-## License
+---
 
-MIT © [Sindre Sorhus](https://sindresorhus.com)
+<div align="center">
+	<b>
+		<a href="https://tidelift.com/subscription/pkg/npm-normalize-url?utm_source=npm-normalize-url&utm_medium=referral&utm_campaign=readme">Get professional support for this package with a Tidelift subscription</a>
+	</b>
+	<br>
+	<sub>
+		Tidelift helps make open source sustainable for maintainers while giving companies<br>assurances about security, maintenance, and licensing for their dependencies.
+	</sub>
+</div>