diff --git a/wc-mnm-categories.php b/wc-mnm-categories.php
index ca8930f..51ce514 100644
--- a/wc-mnm-categories.php
+++ b/wc-mnm-categories.php
@@ -71,7 +71,7 @@ public static function init() {
 		add_action( 'init', array( __CLASS__, 'load_plugin_textdomain' ) );
 
 		// Check dependencies.
-		if ( ! function_exists( 'WC_Mix_and_Match' ) || version_compare( WC_Mix_and_Match()->version, self::REQ_MNM_VERSION ) < 0 ) {
+		if ( ! function_exists( 'WC_Mix_and_Match' ) || version_compare( WC_Mix_and_Match()->version, self::REQ_MNM_VERSION, '<' ) ) {
 			add_action( 'admin_notices', array( __CLASS__, 'version_notice' ) );
 			return false;
 		}