diff --git a/extension.js b/extension.js
index 1771bae..6789a48 100644
--- a/extension.js
+++ b/extension.js
@@ -2,51 +2,58 @@ const { spawnSync } = require("node:child_process");
 const { dirname } = require("node:path");
 const vscode = require("vscode");
 
+const yamlformattedLanguages = [
+  "yaml",
+  "github-actions-workflow" // Provided in https://github.com/github/vscode-github-actions
+];
+const provider = {
+  provideDocumentFormattingEdits(document) {
+    const workspaceFolder = vscode.workspace.getWorkspaceFolder(document.uri);
+    const config = vscode.workspace.getConfiguration("", document.uri);
 
-function activate() {
-  vscode.languages.registerDocumentFormattingEditProvider("yaml", {
-    provideDocumentFormattingEdits(document) {
-      const workspaceFolder = vscode.workspace.getWorkspaceFolder(document.uri);
-      const config = vscode.workspace.getConfiguration("", document.uri);
-
-      const args = config.get("yamlfmt.args", []).filter(arg => arg !== "-in");
-      args.push("-in");
-
-      const result = spawnSync("yamlfmt", args, {
-        cwd: workspaceFolder ? workspaceFolder.uri.fsPath : dirname(document.uri.fsPath),
-        input: document.getText(),
-      });
-
-      if (result.error) {
-        console.error(result.error);
-        const prefix = "spawnSync ";
-        vscode.window.showErrorMessage(
-          result.error.message.startsWith(prefix) ?
-            result.error.message.substring(prefix.length) :
-            result.error.message
-        );
-        return [];
-      }
-
-      if (result.stderr.length > 0) {
-        console.log(result.stderr.toString());
-        vscode.window.showErrorMessage(result.stderr.toString());
-        return [];
-      }
-
-      if (result.stdout.length < 1) {
-        console.warn("yamlfmt's stdout buffer is empty");
-        return [];
-      }
-
-      const range = new vscode.Range(
-        document.lineAt(0).range.start,
-        document.lineAt(document.lineCount - 1).range.end,
+    const args = config.get("yamlfmt.args", []).filter(arg => arg !== "-in");
+    args.push("-in");
+
+    const result = spawnSync("yamlfmt", args, {
+      cwd: workspaceFolder ? workspaceFolder.uri.fsPath : dirname(document.uri.fsPath),
+      input: document.getText(),
+    });
+
+    if (result.error) {
+      console.error(result.error);
+      const prefix = "spawnSync ";
+      vscode.window.showErrorMessage(
+        result.error.message.startsWith(prefix) ?
+          result.error.message.substring(prefix.length) :
+          result.error.message
       );
+      return [];
+    }
+
+    if (result.stderr.length > 0) {
+      console.log(result.stderr.toString());
+      vscode.window.showErrorMessage(result.stderr.toString());
+      return [];
+    }
 
-      return [vscode.TextEdit.replace(range, result.stdout.toString())];
+    if (result.stdout.length < 1) {
+      console.warn("yamlfmt's stdout buffer is empty");
+      return [];
     }
-  });
+
+    const range = new vscode.Range(
+      document.lineAt(0).range.start,
+      document.lineAt(document.lineCount - 1).range.end,
+    );
+
+    return [vscode.TextEdit.replace(range, result.stdout.toString())];
+  }
+};
+
+function activate() {
+  for (const lang of yamlformattedLanguages) {
+    vscode.languages.registerDocumentFormattingEditProvider(lang, provider);
+  }
 }
 
 function deactivate() { }
diff --git a/package.json b/package.json
index cb007a2..696e6cb 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,8 @@
     "multi-root ready"
   ],
   "activationEvents": [
-    "onLanguage:yaml"
+    "onLanguage:yaml",
+    "onLanguage:github-actions-workflow"
   ],
   "main": "./extension.js",
   "contributes": {