diff --git a/package.json b/package.json
index f35b32e1..ee218fe5 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,9 @@
   },
   "activationEvents": [
     "onLanguage:yaml",
-    "onLanguage:dockercompose"
+    "onLanguage:dockercompose",
+    "onLanguage:yaml-textmate",
+    "onLanguage:yaml-tmlanguage"
   ],
   "keywords": [
     "kubernetes",
diff --git a/src/extension.ts b/src/extension.ts
index df025f7c..8fcd82fa 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -116,7 +116,7 @@ export function startClient(
   // Options to control the language client
   const clientOptions: LanguageClientOptions = {
     // Register the server for on disk and newly created YAML documents
-    documentSelector: [{ language: 'yaml' }, { language: 'dockercompose' }, { pattern: '*.y(a)ml' }],
+    documentSelector: [{ language: 'yaml' }, { language: 'dockercompose' }, { language: 'yaml-textmate' }, { language: 'yaml-tmlanguage' }, { pattern: '*.y(a)ml' }],
     synchronize: {
       // Notify the server about file changes to YAML and JSON files contained in the workspace
       fileEvents: [workspace.createFileSystemWatcher('**/*.?(e)y?(a)ml'), workspace.createFileSystemWatcher('**/*.json')],