diff --git a/Configuration.md b/Configuration.md
index edeb33e..81c5dc1 100644
--- a/Configuration.md
+++ b/Configuration.md
@@ -39,6 +39,10 @@ default: `medium`
 Changes cursor background while search is highlighted. Possible values are any of gruvbox palette.  
 default: `orange`
 
+### g:gruvbox_number_column
+Changes number column background color. Possible values are any of gruvbox palette.  
+default: `bg4`
+
 ### g:gruvbox_sign_column
 Changes sign column background color. Possible values are any of gruvbox palette.  
 default: `bg1`