diff --git a/changelog.txt b/changelog.txt
index ef8cdfb..a9eaee5 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,5 +1,8 @@
 == Changelog ==
 
+= 1.6.3 - 15 January 2025 =
+* Resolved Uninstall Notice: Updated `register_uninstall_hook` callback to use a static class method, addressing a WordPress notice introduced in version 3.1.0.
+
 = 1.6.2 - 13 January 2025 =
 * Fixed uninstall process to prevent PHP fatal error by updating the `register_uninstall_hook` callback to use a valid instance method.
 
diff --git a/readme.txt b/readme.txt
index a01a70e..30829fb 100644
--- a/readme.txt
+++ b/readme.txt
@@ -72,6 +72,9 @@ SiteOrigin Premium includes access to our professional email support service, pe
 
 == Changelog ==
 
+= 1.6.3 - 15 January 2025 =
+* Resolved Uninstall Notice: Updated `register_uninstall_hook` callback to use a static class method, addressing a WordPress notice introduced in version 3.1.0.
+
 = 1.6.2 - 13 January 2025 =
 * Fixed uninstall process to prevent PHP fatal error by updating the `register_uninstall_hook` callback to use a valid instance method.
 
diff --git a/so-css.php b/so-css.php
index 3d57a81..1379605 100644
--- a/so-css.php
+++ b/so-css.php
@@ -83,7 +83,7 @@ public function __construct() {
 			}
 		}
 
-		register_uninstall_hook( __FILE__, array( $this, 'uninstall' ) );
+		register_uninstall_hook( __FILE__, array( 'SiteOrigin_CSS', 'uninstall' ) );
 	}
 
 	/**
@@ -1050,11 +1050,12 @@ public function version_check() {
 	 *
 	 * @return void
 	 */
-	public function uninstall() {
+	public static function uninstall() {
+		$theme = basename( get_template_directory() );
 		delete_option( 'so_css_version' );
 		delete_option( 'so_css_editor_theme' );
 		delete_option( 'so_css_output_location' );
-		delete_option( 'siteorigin_custom_css_revisions[' . $this->theme . ']' );
+		delete_option( 'siteorigin_custom_css_revisions[' . $theme . ']' );
 	}
 }