diff --git a/src/js/theme-controller.js b/src/js/theme-controller.js
index f330d34b1..6c5c3372f 100644
--- a/src/js/theme-controller.js
+++ b/src/js/theme-controller.js
@@ -174,7 +174,10 @@ export function applyCustomBackground() {
     $(".customBackground img").remove();
   } else {
     $("#words").addClass("noErrorBorder");
-    $(".customBackground").html(`<img src="${Config.customBackground}"></img>`);
+    let $img = $("<img>", {
+      src: Config.customBackground,
+    });
+    $(".customBackground").html($img);
   }
 }