diff --git a/.vscodeignore b/.vscodeignore
index b030a4e1..9e55a3c8 100644
--- a/.vscodeignore
+++ b/.vscodeignore
@@ -21,6 +21,3 @@ CONTRIBUTING.md
 **/**.vsix
 **/**.tar.gz
 test-resources
-!node_modules/prettier/index.js
-!node_modules/prettier/third-party.js
-!node_modules/prettier/parser-yaml.js
diff --git a/smoke-test/smoke.test.ts b/smoke-test/smoke.test.ts
index 5a2ed3b1..21f836d3 100644
--- a/smoke-test/smoke.test.ts
+++ b/smoke-test/smoke.test.ts
@@ -10,9 +10,11 @@ suite('Smoke test suite', function () {
 
   const SCHEMA_INSTANCE_NAME = 'references-schema.yaml';
   const THROUGH_SETTINGS_NAME = 'references-schema-settings.yaml';
+  const UNFORMATTED_NAME = 'unformatted.yaml';
 
   let schemaInstanceUri: URI;
   let throughSettingsUri: URI;
+  let unformattedUri: URI;
 
   this.beforeAll(async function () {
     const workspaceUri = vscode.workspace.workspaceFolders[0].uri;
@@ -22,6 +24,9 @@ suite('Smoke test suite', function () {
     throughSettingsUri = workspaceUri.with({
       path: workspaceUri.path + (workspaceUri.path.endsWith('/') ? '' : '/') + THROUGH_SETTINGS_NAME,
     });
+    unformattedUri = workspaceUri.with({
+      path: workspaceUri.path + (workspaceUri.path.endsWith('/') ? '' : '/') + UNFORMATTED_NAME,
+    });
   });
 
   test('instance has right diagnostics', async function () {
@@ -43,4 +48,28 @@ suite('Smoke test suite', function () {
     assert.strictEqual(diagnostics.length, 1);
     assert.strictEqual(diagnostics[0].message, 'Value is below the minimum of 0.');
   });
+
+  test('has right formatting', async function () {
+    const textDocument = await vscode.workspace.openTextDocument(unformattedUri);
+    await vscode.window.showTextDocument(textDocument);
+
+    // heavily borrowed from prettier's test suite
+    const edits = await vscode.commands.executeCommand<vscode.TextEdit[]>(
+      'vscode.executeFormatDocumentProvider',
+      textDocument.uri,
+      { tabSize: 2, insertSpaces: true }
+    );
+
+    if (edits && edits.length > 0) {
+      const workspaceEdit = new vscode.WorkspaceEdit();
+      workspaceEdit.set(textDocument.uri, edits);
+      await vscode.workspace.applyEdit(workspaceEdit);
+    }
+
+    const EXPECTED = `aaa:
+  bbb: hjkl
+`;
+
+    assert.strictEqual(textDocument.getText(), EXPECTED);
+  });
 });
diff --git a/smoke-test/unformatted.yaml b/smoke-test/unformatted.yaml
new file mode 100644
index 00000000..2630ac88
--- /dev/null
+++ b/smoke-test/unformatted.yaml
@@ -0,0 +1,2 @@
+aaa:
+    bbb:  hjkl
diff --git a/webpack.config.js b/webpack.config.js
index 1326b0d4..45b36661 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -31,7 +31,6 @@ const config = {
   devtool: 'source-map',
   externals: {
     vscode: 'commonjs vscode', // the vscode-module is created on-the-fly and must be excluded. Add other modules that cannot be webpack'ed, 📖 -> https://webpack.js.org/configuration/externals/
-    prettier: 'commonjs prettier',
   },
   resolve: {
     // support reading TypeScript and JavaScript files, 📖 -> https://github.com/TypeStrong/ts-loader
@@ -136,7 +135,6 @@ const serverWeb = {
     mainFields: ['browser', 'module', 'main'],
     extensions: ['.ts', '.js'], // support ts-files and js-files
     alias: {
-      './services/yamlFormatter': path.resolve(__dirname, './build/polyfills/yamlFormatter.js'), // not supported for now. prettier can run in the web, but it's a bit more work.
       'vscode-json-languageservice/lib/umd': 'vscode-json-languageservice/lib/esm',
     },
     fallback: {