diff --git a/extension-command.php b/extension-command.php
index <HASH>..<HASH> 100644
--- a/extension-command.php
+++ b/extension-command.php
@@ -9,8 +9,16 @@ if ( file_exists( $wpcli_extension_autoloader ) ) {
 	require_once $wpcli_extension_autoloader;
 }
 
+$wpcli_extension_requires_wp_5_5 = [
+	'before_invoke' => static function () {
+		if ( WP_CLI\Utils\wp_version_compare( '5.5', '<' ) ) {
+			WP_CLI::error( 'Requires WordPress 5.5 or greater.' );
+		}
+	},
+];
+
 WP_CLI::add_command( 'plugin', 'Plugin_Command' );
-WP_CLI::add_command( 'plugin auto-updates', 'Plugin_AutoUpdates_Command' );
+WP_CLI::add_command( 'plugin auto-updates', 'Plugin_AutoUpdates_Command', $wpcli_extension_requires_wp_5_5 );
 WP_CLI::add_command( 'theme', 'Theme_Command' );
-WP_CLI::add_command( 'theme auto-updates', 'Theme_AutoUpdates_Command' );
+WP_CLI::add_command( 'theme auto-updates', 'Theme_AutoUpdates_Command', $wpcli_extension_requires_wp_5_5 );
 WP_CLI::add_command( 'theme mod', 'Theme_Mod_Command' );
Only run auto-updates commands on WP <I>+