diff --git a/Rakefile b/Rakefile
index 01d885c..45c207c 100644
--- a/Rakefile
+++ b/Rakefile
@@ -17,6 +17,7 @@ task :test do
                               enforce_https: true,
                               validation: { ignore_script_embeds: true },
                               url_swap: { %r{https://choosealicense.com} => '' },
+                              url_ignore: [%r{https://github.com/github/choosealicense.com/edit/gh-pages/_licenses/}],
                               hydra: { max_concurrency: 10 },
                               check_img_http: true).run
 end
diff --git a/_licenses/0bsd.txt b/_licenses/0bsd.txt
new file mode 100644
index 0000000..d778c9a
--- /dev/null
+++ b/_licenses/0bsd.txt
@@ -0,0 +1,39 @@
+---
+title: BSD Zero Clause License
+spdx-id: 0BSD
+
+description: The BSD Zero Clause license goes further than the BSD 2-Clause license to allow you unlimited freedom with the software without requirements to include the copyright notice, license text, or disclaimer in either source or binary forms.
+
+how: Create a text file (typically named LICENSE or LICENSE.txt) in the root of your source code and copy the text of the license into the file.  Replace [year] with the current year and [fullname] with the name (or names) of the copyright holders. You may take the additional step of removing the copyright notice.
+
+using:
+  - PickMeUp: https://github.com/nazar-pc/PickMeUp/blob/master/copying.md
+  - smoltcp: https://github.com/m-labs/smoltcp/blob/master/LICENSE-0BSD.txt
+  - Toybox: https://github.com/landley/toybox/blob/master/LICENSE
+
+permissions:
+  - commercial-use
+  - distribution
+  - modifications
+  - private-use
+
+conditions: []
+
+limitations:
+  - liability
+  - warranty
+
+---
+
+Copyright (c) [year] [fullname]
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.
diff --git a/about.md b/about.md
index f782480..779115e 100644
--- a/about.md
+++ b/about.md
@@ -19,7 +19,7 @@ See our [appendix](/appendix/) for a table of all of the licenses cataloged in t
 {: .bullets}
 
 * Open Source Initiative's FAQ on [Which Open Source license should I choose to release my software under?](https://opensource.org/faq#which-license)
-* Free Software Foundation's [advice on how to choose a license](https://www.gnu.org/licenses/license-recommendations.en.html)
+* Free Software Foundation's [advice on how to choose a license](https://www.gnu.org/licenses/license-recommendations.html)
 * [The Legal Side of Open Source](https://opensource.guide/legal/), an Open Source Guide covering licensing and related issues
 
 ## Help us improve it