diff --git a/filetypes.xml b/filetypes.xml
index 77df892..932b9d6 100644
--- a/filetypes.xml
+++ b/filetypes.xml
@@ -7,6 +7,7 @@
       <mapping pattern=".dockerignore" type="GitIgnore file" />
       <mapping ext="heex" type="Live Embedded Elixir" />
       <mapping ext="livemd" type="Markdown" />
+      <mapping ext="tid" type="Markdown" />
       <mapping pattern="gemfile.lock" type="PLAIN_TEXT" />
       <mapping ext="plist" type="PLAIN_TEXT" />
       <mapping ext="prj" type="PLAIN_TEXT" />