diff --git a/packages/block-library/src/post-content/edit.js b/packages/block-library/src/post-content/edit.js
index 62224133b44c2a..58336deb2c5fd9 100644
--- a/packages/block-library/src/post-content/edit.js
+++ b/packages/block-library/src/post-content/edit.js
@@ -22,7 +22,7 @@ export default function PostContentEdit( { clientId } ) {
 
 	return (
 		<InnerBlocks
-			templateLock={ false }
+			templateLock="readonly"
 			allowedBlocks={ allowedBlocks }
 			renderAppender={ ! hasInnerBlocks && InnerBlocks.ButtonBlockAppender }
 		/>