diff --git a/asciidoc.nanorc b/asciidoc.nanorc
index b16a74e..1f9d2cc 100644
--- a/asciidoc.nanorc
+++ b/asciidoc.nanorc
@@ -1,7 +1,7 @@
 syntax "AsciiDoc" "\.(asc|asciidoc|adoc)$"
 
 # main header
-color red "^====+$"
+color brightred "^=[[:space:]].+$"
 # h1
 color red "^==[[:space:]].*$"
 color red "^----+$"
@@ -24,7 +24,7 @@ color red "\+\+\+\{[a-z0-9]*\}\+\+\+"
 # Paragraph Title
 color yellow "^\..*$"
 
-# source 
+# source
 color magenta "^\[(source,.+|NOTE|TIP|IMPORTANT|WARNING|CAUTION)\]"
 
 # Other markup