diff --git a/includes/functions/_theme_setup.php b/includes/functions/_theme_setup.php
index 1e060cad..b77597a9 100644
--- a/includes/functions/_theme_setup.php
+++ b/includes/functions/_theme_setup.php
@@ -369,7 +369,7 @@ function fictioneer_root_attributes() {
 
   // Output
   foreach ( $output as $key => $value ) {
-    echo "{$key}='{$value}' ";
+    echo "{$key}='" . esc_attr( $value ) . "' ";
   }
 }