diff --git a/markdown.nanorc b/markdown.nanorc
index d50cafb..9d3fd9e 100644
--- a/markdown.nanorc
+++ b/markdown.nanorc
@@ -45,3 +45,6 @@ color yellow   "`[^`]*`|^ {4}[^-+*].*"
 # code blocks
 color yellow start="^```[^$]" end="^```$"
 color yellow "^```$"
+
+## Trailing spaces
+color ,green "[[:space:]]+$"