diff --git a/lib/rouge/lexers/typescript.rb b/lib/rouge/lexers/typescript.rb
index 270d97df43..e7a0d12120 100644
--- a/lib/rouge/lexers/typescript.rb
+++ b/lib/rouge/lexers/typescript.rb
@@ -15,7 +15,7 @@ class Typescript < Javascript
       tag 'typescript'
       aliases 'ts'
 
-      filenames '*.ts', '*.d.ts'
+      filenames '*.ts', '*.d.ts', '*.cts', '*.mts'
 
       mimetypes 'text/typescript'
     end