diff --git a/markdown.nanorc b/markdown.nanorc
index 838d1298..5bcaeae2 100644
--- a/markdown.nanorc
+++ b/markdown.nanorc
@@ -1,4 +1,4 @@
-syntax "Markdown" "\.(md|mdown|mkd|mkdn|markdown)$"
+syntax "Markdown" "\.(md|mdown|mkd|mkdn|markdown|mdx)$"
 
 # @tag +tag #tag
 color brightgreen "\+{1}[a-zA-Z0-9_!:\-\.]*"
@@ -54,4 +54,4 @@ color yellow start="^```[^$]" end="^```$"
 color yellow "^```$"
 
 ## Trailing spaces
-color ,green "[[:space:]]+$"
\ No newline at end of file
+color ,green "[[:space:]]+$"