diff --git a/packages/block-library/src/post-date/block.json b/packages/block-library/src/post-date/block.json
index 260e5f1c2a31f..bb1b92b026a86 100644
--- a/packages/block-library/src/post-date/block.json
+++ b/packages/block-library/src/post-date/block.json
@@ -26,7 +26,8 @@
 		},
 		"typography": {
 			"fontSize": true,
-			"lineHeight": true
+			"lineHeight": true,
+			"__experimentalFontWeight": true
 		}
 	}
 }