diff --git a/RELEASE-NOTES.txt b/RELEASE-NOTES.txt
index 4eb450fe29..04c1e9d6ea 100644
--- a/RELEASE-NOTES.txt
+++ b/RELEASE-NOTES.txt
@@ -1,6 +1,7 @@
 Unreleased
 ---
 * [**] [Gallery block] Fix crash when adding images and selecting a gallery item [https://github.com/wordpress-mobile/gutenberg-mobile/pull/4515]
+* [***] Font size and line-height support for text-based blocks used in block-based themes [https://github.com/wordpress-mobile/gutenberg-mobile/pull/4519]
 
 1.70.0
 ---
diff --git a/gutenberg b/gutenberg
index d9d473b3e6..fa5c739fc4 160000
--- a/gutenberg
+++ b/gutenberg
@@ -1 +1 @@
-Subproject commit d9d473b3e67577ee4f6f43508e16d154b0221a9e
+Subproject commit fa5c739fc4f38aa92587a2cb31b4b0998bb6bf81