diff --git a/assets/css/custom.css b/assets/css/custom.css
new file mode 100644
index 0000000..0bf6303
--- /dev/null
+++ b/assets/css/custom.css
@@ -0,0 +1,3 @@
+.link-matrix {
+    background: rgb(0, 0, 0);
+  }
diff --git a/config.toml b/config.toml
index 85381ce..9048083 100644
--- a/config.toml
+++ b/config.toml
@@ -36,6 +36,7 @@ disableKinds = ["taxonomy", "term"]
     # { lastfm = "https://last.fm/user/username" },
     # { linkedin = "https://linkedin.com/in/username" },
     # { mastodon = "https://mastodon.instance/@username" },
+    { matrix = { href = "https://matrix.to/#/#thailinuxusercommunity:matrix.org", text = "Matrix" } },
     # { medium = "https://medium.com/username" },
     # { microsoft = "https://www.microsoft.com/" },
     # { patreon = "https://www.patreon.com/username" },