diff --git a/_theme.json b/_theme.json
index 3e9fd49d..567090ad 100644
--- a/_theme.json
+++ b/_theme.json
@@ -80,6 +80,7 @@
 		},
 		"typography": {
 			"fluid": false,
+			"writingMode": true,
 			"fontSizes": [
 				{
 					"name": "Small",
@@ -118,4 +119,4 @@
 			"aspectRatio": true
 		}
 	}
-}
\ No newline at end of file
+}
diff --git a/readme.txt b/readme.txt
index 28a8c466..adfe1c78 100644
--- a/readme.txt
+++ b/readme.txt
@@ -37,6 +37,8 @@ https://www.vektor-inc.co.jp/inquiry/
 
 == Changelog ==
 
+[ G3 / G2 ][ Specification Change ] Added support for the "Writing Mode" option in Typography settings for WordPress 6.7.
+
 v15.27.2
 [ G3 ][ Editor Design Bug Fix ] Fixed a bug in the design of the editor when the slider was set to alignfull and the outer was set to alignfull.
 [ G3 / G2 ][ Bug fix ] Fixed a translation-related notice that occurred in version 6.7.