diff --git a/.plugin-data b/.plugin-data
index b31f38f..57b5ffd 100644
--- a/.plugin-data
+++ b/.plugin-data
@@ -1,4 +1,4 @@
 {
-	"version": "1.1.2",
+	"version": "1.2.0",
 	"slug": "blockparty-iframe"
 }
diff --git a/.wordpress-org/blueprints/blueprint.json b/.wordpress-org/blueprints/blueprint.json
index 66f6ac6..6eb75c6 100644
--- a/.wordpress-org/blueprints/blueprint.json
+++ b/.wordpress-org/blueprints/blueprint.json
@@ -11,7 +11,7 @@
 			"pluginData": {
 				"resource": "git:directory",
 				"url": "https://github.com/BeAPI/blockparty-iframe",
-				"ref": "1.1.2",
+				"ref": "1.2.0",
 				"refType": "tag"
 			},
 			"options": {
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3fa15f3..b3c5c8b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,24 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/).
 
+## [1.2.0] - 2026-04-22
+
+### Changed
+
+- **Dynamic block rendering**: The iframe is rendered on the server via `BlockRenderer` and a `render_callback` (same pattern as blockparty-post-sharing). Post content stores block attributes only; frontend markup is built at display time.
+- **Plugin bootstrap**: Register the block with `register_block_type()` and `render_callback` instead of metadata-collection-only registration.
+
+### Added
+
+- **`includes/BlockRenderer.php`**: PHP render for the wrapper (`get_block_wrapper_attributes()`), `loading`, and custom iframe attributes (parity with the former `save.js` logic).
+- **Block deprecation**: The previous static `save.js` output is kept as a deprecated block definition so existing posts with serialized HTML remain valid in the editor.
+
+### Developer
+
+- **Composer autoload**: PSR-4 `Blockparty\Iframe\` → `includes/`.
+- **PHPCS**: Enforce short array syntax (`[]`) via `Generic.Arrays.DisallowLongArraySyntax`; fix exclusion of `Universal.Arrays.DisallowShortArraySyntax` from WordPress-Core.
+- **Composer**: `composer.lock` ignored in git; dev dependency pins refreshed (`dealerdirect/phpcodesniffer-composer-installer`, `wp-coding-standards/wpcs`).
+
 ## [1.1.2] - 2026-04-21
 
 ### Fixed
@@ -141,6 +159,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/).
 
 ---
 
+[1.2.0]: https://github.com/BeAPI/blockparty-iframe/releases/tag/1.2.0
 [1.1.2]: https://github.com/BeAPI/blockparty-iframe/releases/tag/1.1.2
 [1.1.1]: https://github.com/BeAPI/blockparty-iframe/releases/tag/1.1.1
 [1.1.0]: https://github.com/BeAPI/blockparty-iframe/releases/tag/1.1.0
diff --git a/blockparty-iframe.php b/blockparty-iframe.php
index 351f893..f214e34 100644
--- a/blockparty-iframe.php
+++ b/blockparty-iframe.php
@@ -2,7 +2,7 @@
 /**
  * Plugin Name:       Blockparty Iframe
  * Description:       Add a block to display an embedded frame in the WordPress editor.
- * Version:           1.1.2
+ * Version:           1.2.0
  * Requires at least: 6.7
  * Requires PHP:      8.1
  * Author:            Be API Technical team
@@ -23,7 +23,7 @@
 	include_once __DIR__ . '/vendor/autoload.php';
 }
 
-define( 'BLOCKPARTY_IFRAME_VERSION', '1.1.2' );
+define( 'BLOCKPARTY_IFRAME_VERSION', '1.2.0' );
 define( 'BLOCKPARTY_IFRAME_URL', plugin_dir_url( __FILE__ ) );
 define( 'BLOCKPARTY_IFRAME_DIR', plugin_dir_path( __FILE__ ) );
 define( 'BLOCKPARTY_IFRAME_PLUGIN_BASENAME', plugin_basename( __FILE__ ) );
diff --git a/package-lock.json b/package-lock.json
index 7489962..62fdcf8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
 	"name": "blockparty-iframe",
-	"version": "1.1.1",
+	"version": "1.2.0",
 	"lockfileVersion": 3,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "blockparty-iframe",
-			"version": "1.1.1",
+			"version": "1.2.0",
 			"license": "GPL-2.0-or-later",
 			"dependencies": {
 				"@wordpress/block-editor": "15.17.0",
diff --git a/package.json b/package.json
index 45764d2..d43ae6e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "blockparty-iframe",
-	"version": "1.1.2",
+	"version": "1.2.0",
 	"description": "Add a block to display an embedded frame in the WordPress editor.",
 	"author": "Be API Technical team",
 	"license": "GPL-2.0-or-later",
diff --git a/readme.txt b/readme.txt
index 44a360b..4f98e3f 100644
--- a/readme.txt
+++ b/readme.txt
@@ -2,7 +2,7 @@
 Contributors:      Be API Technical team
 Tags:              block, iframe, editor
 Tested up to:      6.7
-Stable tag:        1.1.2
+Stable tag:        1.2.0
 License:           GPL-2.0-or-later
 License URI:       https://www.gnu.org/licenses/gpl-2.0.html
 
@@ -45,6 +45,9 @@ directory take precedence. For example, `/assets/screenshot-1.png` would win ove
 
 == Changelog ==
 
+= 1.2.0 =
+* Dynamic block: iframe markup is rendered in PHP on the front end (block attributes are stored in post content). Existing posts with the previous static HTML remain supported in the editor.
+
 = 1.1.2 =
 * WordPress.org Playground blueprint: write the demo mu-plugin with a nowdoc so the embedded wp_kses_allowed_html snippet is valid PHP (avoids a fatal on load). Blueprint install ref set to tag 1.1.2.
 * Developer dependencies: remove Psalm static analysis (smaller Composer dev footprint); PHPCS and existing quality tasks remain.
diff --git a/src/blockparty-iframe/block.json b/src/blockparty-iframe/block.json
index 2cfe575..1f1d285 100644
--- a/src/blockparty-iframe/block.json
+++ b/src/blockparty-iframe/block.json
@@ -2,13 +2,16 @@
 	"$schema": "https://schemas.wp.org/trunk/block.json",
 	"apiVersion": 3,
 	"name": "blockparty/iframe",
-	"version": "1.1.2",
+	"version": "1.2.0",
 	"title": "Iframe",
 	"category": "widgets",
 	"description": "Display an embedded frame.",
 	"example": {},
 	"supports": {
-		"align": [ "wide", "full" ],
+		"align": [
+			"wide",
+			"full"
+		],
 		"dimensions": {
 			"aspectRatio": true,
 			"height": true,