diff --git a/docs/customizations.rst b/docs/customizations.rst
index 746476d..1bd251d 100644
--- a/docs/customizations.rst
+++ b/docs/customizations.rst
@@ -67,6 +67,8 @@ theme
 config
     Override parameter to initialize Reveal.js
 
+google_font
+    Use webfont from Google Fonts (san-self only)
 
 Section configuration
 =====================