diff --git a/packages/tailwindcss-language-service/src/util/languages.ts b/packages/tailwindcss-language-service/src/util/languages.ts
index 458261cf..29cfb48f 100644
--- a/packages/tailwindcss-language-service/src/util/languages.ts
+++ b/packages/tailwindcss-language-service/src/util/languages.ts
@@ -8,6 +8,7 @@ export const htmlLanguages: string[] = [
   'django-html',
   'edge',
   'ejs',
+  'elixir',
   'erb',
   'gohtml',
   'GoHTML',
@@ -15,6 +16,7 @@ export const htmlLanguages: string[] = [
   'haml',
   'handlebars',
   'hbs',
+  'heex',
   'html',
   'HTML (Eex)',
   'HTML (EEx)',