diff --git a/script/gallery.ts b/script/gallery.ts
index b6d043b..fb0ea66 100644
--- a/script/gallery.ts
+++ b/script/gallery.ts
@@ -11,7 +11,7 @@ let showSingles = false;
 
 function fillSets(): [Set<string>, Set<string>] {
   function checkedValues(boxes: Boxes) {
-    return new Set(Array.from(boxes).filter(b => b.checked).map(b => b.value));
+    return new Set([...boxes].filter(b => b.checked).map(b => b.value));
   }
 
   return [checkedValues(reqBoxes), checkedValues(excBoxes)];
@@ -38,7 +38,7 @@ function updateItems() {
   }
 
   function disp(pfx: string, tags: string[]) {
-    return Array(...tags).map(x => pfx + x).join('\u2003'); // em space
+    return [...tags].map(x => pfx + x).join('\u2003'); // em space
   }
   let plus  = disp('+\u2009', Array.from(reqTags)); // thin space
   let minus = disp('-\u2009', Array.from(excTags));