diff --git a/src/wp-content/themes/twentytwentyone/classes/class-twenty-twenty-one-custom-colors.php b/src/wp-content/themes/twentytwentyone/classes/class-twenty-twenty-one-custom-colors.php
index ad02f4e0eb..897ef53617 100644
--- a/src/wp-content/themes/twentytwentyone/classes/class-twenty-twenty-one-custom-colors.php
+++ b/src/wp-content/themes/twentytwentyone/classes/class-twenty-twenty-one-custom-colors.php
@@ -113,7 +113,7 @@ class Twenty_Twenty_One_Custom_Colors {
 			'twenty-twenty-one-custom-color-overrides',
 			get_theme_file_uri( 'assets/css/custom-color-overrides.css' ),
 			array(),
-			(string) filemtime( get_theme_file_path( 'assets/css/custom-color-overrides.css' ) )
+			wp_get_theme()->get( 'Version' )
 		);
 
 		$background_color = get_theme_mod( 'background_color', 'D1E4DD' );
diff --git a/src/wp-content/themes/twentytwentyone/classes/class-twenty-twenty-one-customize-color-control.php b/src/wp-content/themes/twentytwentyone/classes/class-twenty-twenty-one-customize-color-control.php
index 818147209d..f2c924e5a4 100644
--- a/src/wp-content/themes/twentytwentyone/classes/class-twenty-twenty-one-customize-color-control.php
+++ b/src/wp-content/themes/twentytwentyone/classes/class-twenty-twenty-one-customize-color-control.php
@@ -52,7 +52,7 @@ class Twenty_Twenty_One_Customize_Color_Control extends WP_Customize_Color_Contr
 			'twentytwentyone-control-color',
 			get_theme_file_uri( 'assets/js/palette-colorpicker.js' ),
 			array( 'customize-controls', 'jquery', 'customize-base', 'wp-color-picker' ),
-			(string) filemtime( get_theme_file_path( 'assets/js/palette-colorpicker.js' ) ),
+			wp_get_theme()->get( 'Version' ),
 			false
 		);
 	}