diff --git a/src/index.js b/src/index.js
index 2526010..9d20a20 100644
--- a/src/index.js
+++ b/src/index.js
@@ -11,6 +11,7 @@ import {
 	ColorPicker,
 	PanelBody,
 	ToolbarGroup,
+	// use __experimentalToolbarItem as ToolbarItem does not seem to be present(?)
 	__experimentalToolbarItem as ToolbarItem,
 } from '@wordpress/components';
 import { __ } from '@wordpress/i18n';
@@ -18,16 +19,19 @@ import { __ } from '@wordpress/i18n';
 const NAMESPACE = 'namespace'; // TODO
 const SLUG = 'slug'; // TODO
 const BLOCK_TITLE = 'Block Title'; // TODO
+const BLOCK_CATEGORIES = ['common', 'formatting', 'layout', 'widgets', 'embed'];
+const BLOCK_CATEGORY = BLOCK_CATEGORIES[3];
 
 const INNER_TEMPLATE = [
 	['core/heading', { placeholder: 'Article Title', className: 'heading' }],
 	['core/paragraph', { placeholder: 'Article Text', className: 'text' }],
 ];
+const ALLOWED_BLOCKS = ['core/image', 'core/paragraph'];
 
 registerBlockType(`${NAMESPACE}/${SLUG}`, {
 	title: __(BLOCK_TITLE, NAMESPACE),
 
-	category: 'widgets',
+	category: BLOCK_CATEGORY,
 
 	supports: {
 		// Removes support for an HTML mode.
@@ -87,6 +91,7 @@ registerBlockType(`${NAMESPACE}/${SLUG}`, {
 					<div>
 						<InnerBlocks
 							template={INNER_TEMPLATE}
+							allowedBlocks={ALLOWED_BLOCKS}
 							templateLock="all"
 						/>
 					</div>