diff --git a/app/EditorBox/Enqueues.php b/app/EditorBox/Enqueues.php
index 491b9b6..869467f 100644
--- a/app/EditorBox/Enqueues.php
+++ b/app/EditorBox/Enqueues.php
@@ -4,8 +4,8 @@
 
 class Enqueues {
 	public function enqueue_editor_stuff() {
-		wp_enqueue_style( 'editor_box_style', plugins_url( 'css/editor.css', EDITORBOX_PLUGIN_FILE ), [], '1.1.1641734139' ); // date '+%s'
-		wp_enqueue_script( 'editor_box_script', plugins_url( 'js/editor.js', EDITORBOX_PLUGIN_FILE ), [], '1.1.1641734139' );
+		wp_enqueue_style( 'editor_box_style', plugins_url( 'css/editor.css', EDITORBOX_PLUGIN_FILE ), [], '1.1.1641749900' ); // date '+%s'
+		wp_enqueue_script( 'editor_box_script', plugins_url( 'js/editor.js', EDITORBOX_PLUGIN_FILE ), [], '1.1.1641749900' );
 		wp_localize_script('editor_box_script', 'editor_box_int', [
 			'ajaxurl'              => admin_url('admin-ajax.php'),
 			'publish_button_value' => __( 'Publish', 'editor_box' ),
diff --git a/app/EditorBox/Hooks.php b/app/EditorBox/Hooks.php
index 3c5de53..82b98ec 100644
--- a/app/EditorBox/Hooks.php
+++ b/app/EditorBox/Hooks.php
@@ -8,6 +8,7 @@ public function register_hooks() {
 		add_action( 'init', [ new ProcessForms(), 'process_post' ], 10, 0 );
 		add_action( 'init', [ new Internationalization(), 'load_text_domain' ] );
 		add_action( 'wp_enqueue_scripts', [ new Enqueues, 'enqueue_editor_stuff' ] );
+		add_filter( 'wp_kses_allowed_html', [ new ProcessForms(), 'kses_allowed_html_filter' ], 10, 2 );
 		add_action( 'wp_ajax_nopriv_editor_box_file', [ new ProcessForms(), 'save_editor_box_file' ] );
 		add_action( 'wp_ajax_editor_box_file', [ new ProcessForms(), 'save_editor_box_file' ] );
 	}
diff --git a/app/EditorBox/ProcessForms.php b/app/EditorBox/ProcessForms.php
index a6f9bff..ee4f8c7 100644
--- a/app/EditorBox/ProcessForms.php
+++ b/app/EditorBox/ProcessForms.php
@@ -3,6 +3,18 @@
 namespace EditorBox;
 
 class ProcessForms {
+	
+	public function kses_allowed_html_filter( $tags, $context ) {
+		$tags['img']['sizes']  = true;
+		$tags['img']['srcset'] = true;
+		$tags['source'] = array(
+			'srcset' => true,
+			'sizes'  => true,
+			'type'   => true,
+		);
+		return $tags;
+	}
+	
 	public function process_post() {
 		if ( $this->publish_button_clicked()
 		     && current_user_can( "edit_posts" )
@@ -78,8 +90,10 @@ public function save_editor_box_file() {
 
 				// Add the metadata.
 				wp_update_attachment_metadata( $id, wp_generate_attachment_metadata( $id, $file ) );
+				
+				$imghtml = wp_get_attachment_image( $id, 'large' );
 
-				wp_send_json( [ 'url' => $url ] );
+				wp_send_json( [ 'imghtml' => $imghtml ] );
 			}
 		} else {
 			wp_send_json( [ 'error' => sprintf( __( 'Incorrect file type or file bigger than %s.', 'editor_box' ), size_format( wp_max_upload_size() ) ) ] );
diff --git a/js/editor.js b/js/editor.js
index f9614f8..b014202 100644
--- a/js/editor.js
+++ b/js/editor.js
@@ -40,10 +40,9 @@ document.addEventListener('DOMContentLoaded', function () {
         request.onload = function() {
             if ( this.status >= 200 && this.status < 400 ) {
                 var resp = JSON.parse( this.response );
-                if ( resp.url !== undefined ) { // if url has been returned
-                    let imageElement = `\n<img src="${resp.url}" />\n`;
+                if ( resp.imghtml !== undefined ) { // if url has been returned
                     const textarea = document.getElementById('editor_box_content');
-                    textarea.value = ( textarea.value + imageElement );
+                    textarea.value = ( textarea.value + resp.imghtml );
                 } else if ( resp.error !== undefined ) { // if error has been returned
                     ajax_errors.style.display = 'block';
                     ajax_errors.innerText = resp.error;
diff --git a/readme.txt b/readme.txt
index 54617ec..b5bb9b3 100644
--- a/readme.txt
+++ b/readme.txt
@@ -61,4 +61,5 @@ Like on Facebook or Twitter, post title is not obligatory to provide. If you sav
 * Feature     - Added visible notification about image being uploaded
 * Feature     - Post can be saved as draft instead immediate publishing (press Ctrl button over Publish button to switch mode)
 * Enhancement - Added assets versioning to help refreshing cached versions between plugin releases
+* Enhancement - Use large image size in rendered html instead of full size
 * Fix         - Fixed issue with not handled image uploads when image size bigger than PHP upload_max_filesize
\ No newline at end of file