diff --git a/index.html b/index.html
index afc98889..6cfadf55 100644
--- a/index.html
+++ b/index.html
@@ -27,6 +27,10 @@
             p stone
             p stone
             p stone
+
+            p stone_bricks
+
+            p deepslate axis=z
         </script>
     </mc-diorama>
 
diff --git a/src/blockstate.js b/src/blockstate.js
index 433a25ce..989ef0c8 100644
--- a/src/blockstate.js
+++ b/src/blockstate.js
@@ -157,14 +157,15 @@ export class BlockstateResolver {
 
         if (!this.pending.has(id)) {
             const [space, name] = id.split(':');
+            const url = `assets/${space}/blockstates/${name}.json`;
 
-            this.pending.set(id, fetch(`assets/${space}/blockstates/${name}.json`)
+            this.pending.set(id, fetch(url)
                 .then(res => res.json())
                 .then(data => {
                     const source = renderBlockstateResolver(data);
 
                     /** @type {ResolverFunction} */
-                    const resolver = new Function(`return function (state, hash) { ${source} }`)();
+                    const resolver = new Function(`return function (state, hash) { ${source} } //# sourceURL=${url}`)();
 
                     this.resolvers.set(id, resolver);
                     this.pending.delete(id);