diff --git a/_config.yml b/_config.yml
index 1ea5bc4133..88ae969cc5 100644
--- a/_config.yml
+++ b/_config.yml
@@ -38,7 +38,7 @@ gems:
   - jekyll-seo-tag
   - jekyll-include-cache
 
-include: _headers
+include: [_headers]
 
 # SEO
 logo: /images/favicon.png