diff --git a/docs/src/extensions/languages.md b/docs/src/extensions/languages.md
index c003285303..174a27c6e6 100644
--- a/docs/src/extensions/languages.md
+++ b/docs/src/extensions/languages.md
@@ -123,6 +123,7 @@ This query marks strings, object keys, and numbers for highlighting. The followi
 | @string.special          | Captures special strings               |
 | @string.special.symbol   | Captures special symbols               |
 | @tag                     | Captures tags                          |
+| @tag.doctype             | Captures doctypes (e.g., in HTML)      |
 | @text.literal            | Captures literal text                  |
 | @title                   | Captures titles                        |
 | @type                    | Captures types                         |
diff --git a/extensions/astro/languages/astro/highlights.scm b/extensions/astro/languages/astro/highlights.scm
index 491e8cc337..a565e22b6e 100644
--- a/extensions/astro/languages/astro/highlights.scm
+++ b/extensions/astro/languages/astro/highlights.scm
@@ -1,6 +1,6 @@
 (tag_name) @tag
 (erroneous_end_tag_name) @keyword
-(doctype) @constant
+(doctype) @tag.doctype
 (attribute_name) @property
 (attribute_value) @string
 (comment) @comment
diff --git a/extensions/elixir/languages/heex/highlights.scm b/extensions/elixir/languages/heex/highlights.scm
index 5252b71fac..9662c95524 100644
--- a/extensions/elixir/languages/heex/highlights.scm
+++ b/extensions/elixir/languages/heex/highlights.scm
@@ -27,7 +27,7 @@
 "=" @operator
 
 ; HEEx inherits the DOCTYPE tag from HTML
-(doctype) @constant
+(doctype) @tag.doctype
 
 (comment) @comment
 
diff --git a/extensions/html/languages/html/highlights.scm b/extensions/html/languages/html/highlights.scm
index e2b8e35bf4..6bb0c23374 100644
--- a/extensions/html/languages/html/highlights.scm
+++ b/extensions/html/languages/html/highlights.scm
@@ -1,6 +1,6 @@
-(tag_name) @keyword
+(tag_name) @tag
 (erroneous_end_tag_name) @keyword
-(doctype) @constant
+(doctype) @tag.doctype
 (attribute_name) @property
 (attribute_value) @string
 (comment) @comment