diff --git a/src/index.ts b/src/index.ts
index f2620fe..a9fd873 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -50,7 +50,7 @@ export default function gemtext(config: GemtextConfig = {}): AstroIntegration {
                       if (lines.at(0) === '---' && lines.lastIndexOf('---')) {
                         frontmatter = lines.slice(1, lines.indexOf('---', 1)).join('\n');
                         try {
-                          data = { ...data, ...parseYaml(frontmatter) };
+                          data = { ...data, ...parseYaml(frontmatter, { schema: 'yaml-1.1' }) };
                         } catch { }
                       }