diff --git a/src/index.ts b/src/index.ts
index 9f52617..83ffc75 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -52,7 +52,12 @@ export default function gemtext(config: GemtextConfig = {}): AstroIntegration {
 
                       const body = lines.slice(bodyStartLineIndex).join('\n');
 
-                      const slug = typeof data['slug'] === 'string' ? data['slug'] : fileUrl.pathname;
+                        const slug =
+                            typeof data["slug"] === "string" ?
+                                data["slug"]
+                            :   fileURLToPath(fileUrl).slice(
+                                    fileURLToPath(fileUrl).lastIndexOf("/") + 1,
+                                )
 
                       return {
                         data,