diff --git a/CHANGELOG.md b/CHANGELOG.md
index 69a9bec7..8322aa7e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,12 @@
 * Support search when there is no title ([#1519](https://github.com/docsifyjs/docsify/issues/1519)) ([bc37268](https://github.com/docsifyjs/docsify/commit/bc3726853fb2d1f9241927ea0317970ab0c8a2f2))
 
 
+### Chore
+
+- Fix missing carbon ([#1501](https://github.com/docsifyjs/docsify/issues/1501))
+- Change Gitter to Discord throughout project ([#1507](https://github.com/docsifyjs/docsify/issues/1507))
+- Add test cases on isExternal ([#1515](https://github.com/docsifyjs/docsify/issues/1515))
+
 
 # [4.12.0](https://github.com/docsifyjs/docsify/compare/v4.11.6...v4.12.0) (2021-02-08)
 
diff --git a/test/integration/__snapshots__/docs.test.js.snap b/test/integration/__snapshots__/docs.test.js.snap
index bdc5a997..3c741042 100644
--- a/test/integration/__snapshots__/docs.test.js.snap
+++ b/test/integration/__snapshots__/docs.test.js.snap
@@ -1,7 +1,7 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`Docs Site coverpage renders and is unchanged 1`] = `
-"<section class=\\"cover show\\" style=\\"background: linear-gradient(to left bottom, hsl(127, 100%, 85%) 0%,hsl(127, 100%, 85%) 100%)\\"><div class=\\"mask\\"></div><div class=\\"cover-main\\"><p><img src=\\"http://127.0.0.1:3001/_media/icon.svg\\" data-origin=\\"_media/icon.svg\\" alt=\\"logo\\"></p><h1 id=\\"docsify-4120\\"><a href=\\"#/?id=docsify-4120\\" data-id=\\"docsify-4120\\" class=\\"anchor\\"><span>docsify <small>4.12.0</small></span></a></h1><blockquote>
+"<section class=\\"cover show\\" style=\\"background: linear-gradient(to left bottom, hsl(127, 100%, 85%) 0%,hsl(127, 100%, 85%) 100%)\\"><div class=\\"mask\\"></div><div class=\\"cover-main\\"><p><img src=\\"http://127.0.0.1:3001/_media/icon.svg\\" data-origin=\\"_media/icon.svg\\" alt=\\"logo\\"></p><h1 id=\\"docsify-4121\\"><a href=\\"#/?id=docsify-4121\\" data-id=\\"docsify-4121\\" class=\\"anchor\\"><span>docsify <small>4.12.1</small></span></a></h1><blockquote>
 <p>A magical documentation site generator.</p></blockquote>
 <ul><li>Simple and lightweight</li><li>No statically built html files</li><li>Multiple themes</li></ul><p><a href=\\"https://github.com/docsifyjs/docsify/\\" target=\\"_blank\\" rel=\\"noopener\\">GitHub</a>
 <a href=\\"#/?id=docsify\\">Getting Started</a></p></div></section>"