diff --git a/packages/block-library/src/heading/block.json b/packages/block-library/src/heading/block.json
index fbfd5408d36b88..33d6b8f31e9a88 100644
--- a/packages/block-library/src/heading/block.json
+++ b/packages/block-library/src/heading/block.json
@@ -35,6 +35,7 @@
 		"fontSize": true,
 		"lineHeight": true,
 		"__experimentalSelector": "h1,h2,h3,h4,h5,h6",
+		"__experimentalFontWeight": true,
 		"__unstablePasteTextInline": true
 	},
 	"editorStyle": "wp-block-heading-editor",