diff --git a/packages/tailwindcss-language-service/src/util/languages.ts b/packages/tailwindcss-language-service/src/util/languages.ts
index 565f7e1..0558bbc 100644
--- a/packages/tailwindcss-language-service/src/util/languages.ts
+++ b/packages/tailwindcss-language-service/src/util/languages.ts
@@ -54,6 +54,8 @@ export const jsLanguages = [
   'rescript',
   'typescript',
   'typescriptreact',
+  'glimmer-js',
+  'glimmer-ts',
 ]
 
 export const specialLanguages = ['vue', 'svelte']
diff --git a/packages/vscode-tailwindcss/CHANGELOG.md b/packages/vscode-tailwindcss/CHANGELOG.md
index bf1b4a2..176d09b 100644
--- a/packages/vscode-tailwindcss/CHANGELOG.md
+++ b/packages/vscode-tailwindcss/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 ## 0.11.x (Pre-Release)
 
-Nothing yet.
+- Add support for Glimmer (#867)
 
 ## 0.10.1
 
diff --git a/packages/vscode-tailwindcss/package.json b/packages/vscode-tailwindcss/package.json
index d01d568..908e2d7 100755
--- a/packages/vscode-tailwindcss/package.json
+++ b/packages/vscode-tailwindcss/package.json
@@ -83,7 +83,9 @@
           "source.css",
           "source.vue",
           "source.svelte",
-          "text.html"
+          "text.html",
+          "source.gjs",
+          "source.gts"
         ]
       },
       {
@@ -108,7 +110,9 @@
           "source.css.postcss",
           "source.vue",
           "source.svelte",
-          "text.html"
+          "text.html",
+          "source.gjs",
+          "source.gts"
         ]
       },
       {
@@ -119,7 +123,9 @@
           "source.css.postcss",
           "source.vue",
           "source.svelte",
-          "text.html"
+          "text.html",
+          "source.gjs",
+          "source.gts"
         ]
       },
       {
@@ -130,7 +136,9 @@
           "source.css.postcss",
           "source.vue",
           "source.svelte",
-          "text.html"
+          "text.html",
+          "source.gjs",
+          "source.gts"
         ]
       }
     ],