diff --git a/README.md b/README.md
index cfafecdad2..0581c7fe17 100644
--- a/README.md
+++ b/README.md
@@ -297,15 +297,18 @@ as `platform`. The `platform` key corresponds to the SVG id of the sprite in the
 
 The theme ships with an icon for `rss` and icons of select social-media platforms:
 
+- `codeberg`
 - `devto`
 - `dribbble`
 - `facebook`
 - `flickr`
 - `github`
+- `gitlab`
 - `google_scholar`
 - `instagram`
 - `keybase`
 - `linkedin`
+- `mastodon`
 - `microdotblog`
 - `pinterest`
 - `stackoverflow`
diff --git a/_includes/social-icons/codeberg.svg b/_includes/social-icons/codeberg.svg
new file mode 100644
index 0000000000..d41b0034a4
--- /dev/null
+++ b/_includes/social-icons/codeberg.svg
@@ -0,0 +1,11 @@
+<g
+   style="opacity:1"
+   transform="translate(-44.867463,-75.990641)">
+  <g
+     style="opacity:1"
+     transform="matrix(0.62731857,0,0,0.30231784,25.415003,63.342477)" />
+  <path
+     style="fill-opacity:1;stroke:none;stroke-width:0.247828;paint-order:markers fill stroke;stop-color:#000000"
+     d="m 52.866549,76.247505 c -4.39704,0 -7.936587,3.541376 -7.936587,7.938416 -2.1e-4,1.490827 0.420008,2.953458 1.212473,4.21737 l 6.616999,-8.555396 c 0.04781,-0.0612 0.166275,-0.0612 0.21405,0 l 2.763577,3.573179 h -1.979265 l 0.04286,0.157651 h 2.059061 l 0.583856,0.753172 h -2.430784 l 0.06818,0.247163 h 2.553387 l 0.513795,0.663645 h -2.882295 l 0.08948,0.319162 h 3.037983 l 0.459304,0.591634 h -3.331852 l 0.108975,0.389239 h 3.522585 l 0.402862,0.519626 h -3.781429 l 0.120675,0.430106 h 3.993552 l 0.3717,0.480709 h -4.230994 l 0.120675,0.430102 h 4.44312 c 0.792461,-1.263911 1.212724,-2.726542 1.212472,-4.217362 4e-6,-4.39704 -3.541365,-7.938416 -7.938408,-7.938416 z m 2.41707,12.636494 0.120675,0.430106 h 3.522521 c 0.114862,-0.1356 0.2337,-0.286688 0.339562,-0.430106 z m 0.254962,0.910808 0.118725,0.430105 h 2.356826 c 0.154163,-0.1314 0.321225,-0.283237 0.471203,-0.430102 z m 0.253013,0.91081 0.120675,0.428161 h 0.795843 c 0.235163,-0.134962 0.45306,-0.272325 0.688797,-0.428161 z" />
+</g>
+