diff --git a/src/file-system-loader.ts b/src/file-system-loader.ts
index 028083e7..e8908bcb 100644
--- a/src/file-system-loader.ts
+++ b/src/file-system-loader.ts
@@ -77,7 +77,7 @@ export default class FileSystemLoader {
       this.fetch.bind(this),
     );
 
-    const re = new RegExp(/@import\s'(\D+?)';/, 'gm');
+    const re = new RegExp(/@import\s['"](\D+?)['"];/, 'gm');
 
     let importTokens: Core.ExportTokens = {};