diff --git a/theme13/README.md b/theme13/README.md
index e7c2fd7..7268c40 100644
--- a/theme13/README.md
+++ b/theme13/README.md
@@ -1,6 +1,6 @@
 # Theme 13: Document
 
-A Javascript-based theme, powered by the NPF variable.
+A Javascript-based theme, powered by [the NPF variable](https://github.com/tumblr/docs/blob/master/npf-spec.md) offered by Tumblr.
 
 <!-- PREVIEWS: [Live preview](https://themenametheme.tumblr.com), [(static) index page](https://starlightpreviews.tumblr.com/theme13), [(static) permalink](https://starlightpreviews.tumblr.com/theme13/permalink) -->
 
diff --git a/theme13/theme13.html b/theme13/theme13.html
index ee6f275..fa9ac68 100644
--- a/theme13/theme13.html
+++ b/theme13/theme13.html
@@ -1,7 +1,5 @@
 <!--
 	THEME 13: DOCUMENT by starlightthemes
-	Powered by the NPF variable offered by Tumblr.
-	https://github.com/tumblr/docs/blob/master/npf-spec.md
 	
 	Credits:
 		Layout and design by Google: https://docs.google.com