diff --git a/syntax/html.nanorc b/syntax/html.nanorc
index 7a099de9..395becd3 100644
--- a/syntax/html.nanorc
+++ b/syntax/html.nanorc
@@ -8,8 +8,8 @@ formatter tidy -m -q
 
 # Tags:
 color cyan "<[[:alpha:]/!?][^>]*>"
-# Bold, italic, and underlined:
-color brightmagenta "</?[biu]>"
+# Bold, italic, underlined, emphasis, and importance:
+color brightmagenta "</?(b|i|u|em|strong)>"
 
 # Named character references:
 color red "&[^;[:space:]]*;"