diff --git a/includes/class-create-block-theme-api.php b/includes/class-create-block-theme-api.php
index 9b9dcb4..66fcfec 100644
--- a/includes/class-create-block-theme-api.php
+++ b/includes/class-create-block-theme-api.php
@@ -466,6 +466,7 @@ class CBT_Theme_API {
 		$sanitized_theme['subfolder']           = sanitize_text_field( $theme['subfolder'] ?? '' );
 		$sanitized_theme['version']             = sanitize_text_field( $theme['version'] ?? '' );
 		$sanitized_theme['screenshot']          = sanitize_text_field( $theme['screenshot'] ?? '' );
+		$sanitized_theme['requires_wp']         = sanitize_text_field( $theme['requires_wp'] ?? '' );
 		$sanitized_theme['recommended_plugins'] = sanitize_textarea_field( $theme['recommended_plugins'] ?? '' );
 		$sanitized_theme['font_credits']        = sanitize_textarea_field( $theme['font_credits'] ?? '' );
 		$sanitized_theme['image_credits']       = sanitize_textarea_field( $theme['image_credits'] ?? '' );
diff --git a/includes/class-create-block-theme-editor-tools.php b/includes/class-create-block-theme-editor-tools.php
index a88d18a..876f236 100644
--- a/includes/class-create-block-theme-editor-tools.php
+++ b/includes/class-create-block-theme-editor-tools.php
@@ -38,6 +38,13 @@ class CBT_Editor_Tools {
 			'create-block-theme-slot-fill',
 		);
 
+		global $wp_version;
+		wp_add_inline_script(
+			'create-block-theme-slot-fill',
+			'const WP_VERSION = "' . $wp_version . '";',
+			'before'
+		);
+
 		// Enable localization in the plugin sidebar.
 		wp_set_script_translations( 'create-block-theme-slot-fill', 'create-block-theme' );
 	}
diff --git a/includes/create-theme/theme-readme.php b/includes/create-theme/theme-readme.php
index 2da3b57..be428bb 100644
--- a/includes/create-theme/theme-readme.php
+++ b/includes/create-theme/theme-readme.php
@@ -50,6 +50,7 @@ class CBT_Theme_Readme {
 		$author_uri           = $theme['author_uri'] ?? '';
 		$copy_year            = $theme['copyright_year'] ?? gmdate( 'Y' );
 		$wp_version           = $theme['wp_version'] ?? CBT_Theme_Utils::get_current_wordpress_version();
+		$requires_wp          = ( '' === $theme['requires_wp'] ) ? CBT_Theme_Utils::get_current_wordpress_version() : $theme['requires_wp'];
 		$required_php_version = $theme['required_php_version'] ?? '5.7';
 		$license              = $theme['license'] ?? 'GPLv2 or later';
 		$license_uri          = $theme['license_uri'] ?? 'http://www.gnu.org/licenses/gpl-2.0.html';
@@ -67,7 +68,7 @@ class CBT_Theme_Readme {
 		// Adds the Theme section.
 		$theme_section_content = "
 Contributors: {$author}
-Requires at least: 6.0
+Requires at least: {$requires_wp}
 Tested up to: {$wp_version}
 Requires PHP: {$required_php_version}
 License: {$license}
@@ -210,6 +211,7 @@ GNU General Public License for more details.
 		$description         = $theme['description'] ?? '';
 		$author              = $theme['author'] ?? '';
 		$wp_version          = $theme['wp_version'] ?? CBT_Theme_Utils::get_current_wordpress_version();
+		$requires_wp         = ( '' === $theme['requires_wp'] ) ? CBT_Theme_Utils::get_current_wordpress_version() : $theme['requires_wp'];
 		$image_credits       = $theme['image_credits'] ?? '';
 		$recommended_plugins = $theme['recommended_plugins'] ?? '';
 		$font_credits        = $theme['font_credits'] ?? '';
@@ -220,6 +222,9 @@ GNU General Public License for more details.
 		// Update Author/Contributors.
 		$readme_content = self::add_or_update_prop( 'Contributors', $author, $readme_content );
 
+		// Update Required WordPress version.
+		$readme_content = self::add_or_update_prop( 'Requires at least', $requires_wp, $readme_content );
+
 		// Update "Tested up to" version.
 		$readme_content = self::add_or_update_prop( 'Tested up to', $wp_version, $readme_content );
 
diff --git a/includes/create-theme/theme-styles.php b/includes/create-theme/theme-styles.php
index 6864f98..e1fb4cb 100644
--- a/includes/create-theme/theme-styles.php
+++ b/includes/create-theme/theme-styles.php
@@ -25,7 +25,7 @@ class CBT_Theme_Styles {
 		$author        = stripslashes( $theme['author'] );
 		$author_uri    = $theme['author_uri'];
 		$wp_version    = CBT_Theme_Utils::get_current_wordpress_version();
-		$wp_min        = $current_theme->get( 'RequiresWP' );
+		$requires_wp   = ( '' === $theme['requires_wp'] ) ? CBT_Theme_Utils::get_current_wordpress_version() : $theme['requires_wp'];
 		$version       = $theme['version'];
 		$requires_php  = $current_theme->get( 'RequiresPHP' );
 		$text_domain   = $theme['slug'];
@@ -46,7 +46,7 @@ Theme URI: {$uri}
 Author: {$author}
 Author URI: {$author_uri}
 Description: {$description}
-Requires at least: {$wp_min}
+Requires at least: {$requires_wp}
 Tested up to: {$wp_version}
 Requires PHP: {$requires_php}
 Version: {$version}
@@ -67,6 +67,7 @@ Tags: {$tags}
 		$uri         = $theme['uri'];
 		$author      = stripslashes( $theme['author'] );
 		$author_uri  = $theme['author_uri'];
+		$requires_wp = ( '' === $theme['requires_wp'] ) ? CBT_Theme_Utils::get_current_wordpress_version() : $theme['requires_wp'];
 		$wp_version  = CBT_Theme_Utils::get_current_wordpress_version();
 		$text_domain = sanitize_title( $name );
 		if ( isset( $theme['template'] ) ) {
@@ -85,7 +86,7 @@ Theme URI: {$uri}
 Author: {$author}
 Author URI: {$author_uri}
 Description: {$description}
-Requires at least: 6.0
+Requires at least: {$requires_wp}
 Tested up to: {$wp_version}
 Requires PHP: 5.7
 Version: {$version}
diff --git a/src/editor-sidebar/create-panel.js b/src/editor-sidebar/create-panel.js
index b80aa1f..951c03a 100644
--- a/src/editor-sidebar/create-panel.js
+++ b/src/editor-sidebar/create-panel.js
@@ -14,6 +14,7 @@ import {
 	__experimentalText as Text,
 	PanelBody,
 	Button,
+	SelectControl,
 	TextControl,
 	TextareaControl,
 } from '@wordpress/components';
@@ -28,6 +29,9 @@ import {
 	createClonedTheme,
 	createChildTheme,
 } from '../resolvers';
+import { generateWpVersions } from '../utils/generate-versions';
+
+const WP_MINIMUM_VERSIONS = generateWpVersions( WP_VERSION ); // eslint-disable-line no-undef
 
 export const CreateThemePanel = ( { createType } ) => {
 	const { createErrorNotice } = useDispatch( noticesStore );
@@ -47,6 +51,7 @@ export const CreateThemePanel = ( { createType } ) => {
 		author: '',
 		author_uri: '',
 		tags_custom: '',
+		requires_wp: '',
 		subfolder,
 	} );
 
@@ -195,6 +200,20 @@ export const CreateThemePanel = ( { createType } ) => {
 							'create-block-theme'
 						) }
 					/>
+					<SelectControl
+						label={ __(
+							'Minimum WordPress version',
+							'create-block-theme'
+						) }
+						value={ theme.requires_wp }
+						options={ WP_MINIMUM_VERSIONS.map( ( version ) => ( {
+							label: version,
+							value: version,
+						} ) ) }
+						onChange={ ( value ) => {
+							setTheme( { ...theme, requires_wp: value } );
+						} }
+					/>
 				</details>
 				<br />
 				{ createType === 'createClone' && (
diff --git a/src/editor-sidebar/metadata-editor-modal.js b/src/editor-sidebar/metadata-editor-modal.js
index ffb78dc..2cc2b87 100644
--- a/src/editor-sidebar/metadata-editor-modal.js
+++ b/src/editor-sidebar/metadata-editor-modal.js
@@ -18,6 +18,7 @@ import {
 	FormTokenField,
 	Modal,
 	Button,
+	SelectControl,
 	TextControl,
 	TextareaControl,
 	ExternalLink,
@@ -29,6 +30,7 @@ import { MediaUpload, MediaUploadCheck } from '@wordpress/block-editor';
  */
 import { postUpdateThemeMetadata, fetchReadmeData } from '../resolvers';
 import { getFontsCreditsText } from '../utils/fonts';
+import { generateWpVersions } from '../utils/generate-versions';
 
 const ALLOWED_SCREENSHOT_MEDIA_TYPES = [
 	'image/png',
@@ -39,12 +41,15 @@ const ALLOWED_SCREENSHOT_MEDIA_TYPES = [
 	'image/avif',
 ];
 
+const WP_MINIMUM_VERSIONS = generateWpVersions( WP_VERSION ); // eslint-disable-line no-undef
+
 export const ThemeMetadataEditorModal = ( { onRequestClose } ) => {
 	const [ theme, setTheme ] = useState( {
 		name: '',
 		description: '',
 		uri: '',
 		version: '',
+		requires_wp: '',
 		author: '',
 		author_uri: '',
 		tags_custom: '',
@@ -65,6 +70,7 @@ export const ThemeMetadataEditorModal = ( { onRequestClose } ) => {
 			description: themeData.description.raw,
 			uri: themeData.theme_uri.raw,
 			version: themeData.version,
+			requires_wp: themeData.requires_wp,
 			author: themeData.author.raw,
 			author_uri: themeData.author_uri.raw,
 			tags_custom: themeData.tags.rendered,
@@ -212,6 +218,20 @@ export const ThemeMetadataEditorModal = ( { onRequestClose } ) => {
 						'create-block-theme'
 					) }
 				/>
+				<SelectControl
+					label={ __(
+						'Minimum WordPress version',
+						'create-block-theme'
+					) }
+					value={ theme.requires_wp }
+					options={ WP_MINIMUM_VERSIONS.map( ( version ) => ( {
+						label: version,
+						value: version,
+					} ) ) }
+					onChange={ ( value ) => {
+						setTheme( { ...theme, requires_wp: value } );
+					} }
+				/>
 				<FormTokenField
 					label={ __( 'Theme tags', 'create-block-theme' ) }
 					value={
diff --git a/src/utils/generate-versions.js b/src/utils/generate-versions.js
new file mode 100644
index 0000000..75c2085
--- /dev/null
+++ b/src/utils/generate-versions.js
@@ -0,0 +1,21 @@
+export function generateWpVersions( versionString ) {
+	const version = versionString.split( '-' )[ 0 ];
+	let [ major, minor ] = version.split( '.' ).slice( 0, 2 ).map( Number );
+
+	const versions = [];
+
+	// Iterate through the versions from current to 5.9
+	while ( major > 5 || ( major === 5 && minor >= 9 ) ) {
+		versions.push( `${ major }.${ minor }` );
+
+		// Decrement minor version
+		if ( minor === 0 ) {
+			minor = 9; // Wrap around if minor is 0, decrement the major version
+			major--;
+		} else {
+			minor--;
+		}
+	}
+
+	return versions;
+}
diff --git a/tests/CbtThemeReadme/create.php b/tests/CbtThemeReadme/create.php
index 6faff42..3c738c4 100644
--- a/tests/CbtThemeReadme/create.php
+++ b/tests/CbtThemeReadme/create.php
@@ -28,6 +28,7 @@ class CBT_ThemeReadme_Create extends CBT_Theme_Readme_UnitTestCase {
 		$expected_uri                 = 'Theme URI: ' . $data['uri'];
 		$expected_author              = 'Contributors: ' . $data['author'];
 		$expected_author_uri          = 'Author URI: ' . $data['author_uri'];
+		$expected_requires_wp         = 'Requires at least: ' . $data['requires_wp'] ?? CBT_Theme_Utils::get_current_wordpress_version();
 		$expected_wp_version          = 'Tested up to: ' . $data['wp_version'] ?? CBT_Theme_Utils::get_current_wordpress_version();
 		$expected_php_version         = 'Requires PHP: ' . $data['required_php_version'];
 		$expected_license             = 'License: ' . $data['license'];
@@ -46,6 +47,7 @@ class CBT_ThemeReadme_Create extends CBT_Theme_Readme_UnitTestCase {
 
 		$this->assertStringContainsString( $expected_name, $readme_without_newlines, 'The expected name is missing.' );
 		$this->assertStringContainsString( $expected_author, $readme_without_newlines, 'The expected author is missing.' );
+		$this->assertStringContainsString( $expected_requires_wp, $readme_without_newlines, 'The expected Requires at least version is missing.' );
 		$this->assertStringContainsString( $expected_wp_version, $readme_without_newlines, 'The expected WP version is missing.' );
 		$this->assertStringContainsString( $expected_recommended_plugins, $readme_without_newlines, 'The expected recommended plugins are missing.' );
 
@@ -94,6 +96,7 @@ class CBT_ThemeReadme_Create extends CBT_Theme_Readme_UnitTestCase {
 					'author_uri'           => 'https://example.com/author',
 					'copyright_year'       => '2077',
 					'wp_version'           => '12.12',
+					'requires_wp'          => '12.12',
 					'required_php_version' => '10.0',
 					'license'              => 'GPLv2 or later',
 					'license_uri'          => 'https://www.gnu.org/licenses/gpl-2.0.html',
@@ -110,6 +113,7 @@ class CBT_ThemeReadme_Create extends CBT_Theme_Readme_UnitTestCase {
 					'author'               => 'New theme author',
 					'author_uri'           => 'https://example.com/author',
 					'copyright_year'       => '2078',
+					'requires_wp'          => '12.12',
 					'wp_version'           => '13.13',
 					'required_php_version' => '11.0',
 					'license'              => 'GPLv2 or later',
@@ -128,6 +132,7 @@ class CBT_ThemeReadme_Create extends CBT_Theme_Readme_UnitTestCase {
 					'author'               => 'New theme author',
 					'author_uri'           => 'https://example.com/author',
 					'copyright_year'       => '2079',
+					'requires_wp'          => '12.12',
 					'wp_version'           => '14.14',
 					'required_php_version' => '12.0',
 					'license'              => 'GPLv2 or later',
@@ -146,6 +151,7 @@ class CBT_ThemeReadme_Create extends CBT_Theme_Readme_UnitTestCase {
 					'author'               => 'New theme author',
 					'author_uri'           => 'https://example.com/author',
 					'copyright_year'       => '2077',
+					'requires_wp'          => '12.12',
 					'wp_version'           => '12.12',
 					'required_php_version' => '10.0',
 					'license'              => 'GPLv2 or later',
@@ -162,6 +168,7 @@ class CBT_ThemeReadme_Create extends CBT_Theme_Readme_UnitTestCase {
 					'author'               => 'New theme author',
 					'author_uri'           => 'https://example.com/author',
 					'copyright_year'       => '2077',
+					'requires_wp'          => '12.12',
 					'wp_version'           => '12.12',
 					'required_php_version' => '10.0',
 					'license'              => 'GPLv2 or later',
@@ -182,6 +189,7 @@ class CBT_ThemeReadme_Create extends CBT_Theme_Readme_UnitTestCase {
 					'author'               => 'New theme author',
 					'author_uri'           => 'https://example.com/author',
 					'copyright_year'       => '2077',
+					'requires_wp'          => '12.12',
 					'wp_version'           => '12.12',
 					'required_php_version' => '10.0',
 					'license'              => 'GPLv2 or later',
diff --git a/tests/CbtThemeReadme/update.php b/tests/CbtThemeReadme/update.php
index d6ca901..6144f47 100644
--- a/tests/CbtThemeReadme/update.php
+++ b/tests/CbtThemeReadme/update.php
@@ -48,6 +48,7 @@ class CBT_ThemeReadme_Update extends CBT_Theme_Readme_UnitTestCase {
 					'description'         => 'New theme description',
 					'author'              => 'New theme author',
 					'wp_version'          => '12.12',
+					'requires_wp'         => '',
 					'image_credits'       => 'New image credits',
 					'recommended_plugins' => 'New recommended plugins',
 					'font_credits'        => 'Example font credits text',
@@ -58,6 +59,7 @@ class CBT_ThemeReadme_Update extends CBT_Theme_Readme_UnitTestCase {
 					'description'         => 'New theme description',
 					'author'              => 'New theme author',
 					'wp_version'          => '12.12',
+					'requires_wp'         => '',
 					'image_credits'       => 'New image credits',
 					'recommended_plugins' => 'New recommended plugins',
 				),
@@ -71,6 +73,7 @@ class CBT_ThemeReadme_Update extends CBT_Theme_Readme_UnitTestCase {
 					'description'         => 'New theme description',
 					'author'              => 'New theme author',
 					'wp_version'          => '12.12',
+					'requires_wp'         => '',
 					'image_credits'       => "New image credits \r\n New image credits 2",
 					'recommended_plugins' => "Plugin1 \r\n Plugin2 \r\n Plugin3",
 					'font_credits'        => "Font1 \r\n Font2 \r\n Font3",