diff --git a/lib/binding_web/binding.js b/lib/binding_web/binding.js
index 61d0a92f..96f6ef08 100644
--- a/lib/binding_web/binding.js
+++ b/lib/binding_web/binding.js
@@ -212,7 +212,7 @@ class Node {
 
   get typeId() {
     marshalNode(this);
-    return C._ts_node_symbol_wasm(this.tree);
+    return C._ts_node_symbol_wasm(this.tree[0]);
   }
 
   get type() {
diff --git a/script/serve-docs b/script/serve-docs
index 2e9b258e..9639016e 100755
--- a/script/serve-docs
+++ b/script/serve-docs
@@ -10,6 +10,7 @@ bundle exec ruby <<RUBY &
 
   def copy_wasm_files
     `cp $root/lib/binding_web/tree-sitter.{js,wasm} $root/docs/assets/js/`
+    `cp $root/target/release/*.wasm $root/docs/assets/js/`
   end
 
   puts "Copying WASM files to docs folder..."