diff --git a/lang/dk.css b/lang/da.css
similarity index 100%
rename from lang/dk.css
rename to lang/da.css
diff --git a/languages.html b/languages.html
index f2369bc..6365336 100644
--- a/languages.html
+++ b/languages.html
@@ -41,7 +41,7 @@
       <!-- ↓ Sort alphabetically ↓ -->
       <option value="cs">Czech (cs)</option>
       <option value="de">German (de)</option>
-      <option value="dk">Danish (dk)</option>
+      <option value="da">Danish (da)</option>
       <option value="es">Spanish (es)</option>
       <option value="fr">French (fr)</option>
       <option value="hu">Hungarian (hu)</option>