diff --git a/packages/docusaurus/src/babel/preset.ts b/packages/docusaurus/src/babel/preset.ts
index 3dd351ef9ac5c..3f92315190834 100644
--- a/packages/docusaurus/src/babel/preset.ts
+++ b/packages/docusaurus/src/babel/preset.ts
@@ -16,6 +16,7 @@ function getTransformOptions(isServer: boolean): TransformOptions {
     // All optional newlines and whitespace will be omitted when generating code
     // in compact mode
     compact: true,
+    sourceType: 'module',
     presets: [
       isServer
         ? [