diff --git a/themes.txt b/themes.txt
index 727a489..7936b60 100644
--- a/themes.txt
+++ b/themes.txt
@@ -268,6 +268,7 @@ github.com/pdevty/material-design
 github.com/pdevty/polymer
 github.com/peaceiris/hugo-theme-iris
 github.com/pfadfinder-konstanz/hugo-dpsg
+github.com/ph-ph/chalk
 github.com/PippoRJ/hugo-refresh
 github.com/pjbakker/flexible-seo-hugo
 github.com/plopcas/papaya