diff --git a/src/WebComponent.js b/src/WebComponent.js
index 40ccffc..5f3c2fd 100644
--- a/src/WebComponent.js
+++ b/src/WebComponent.js
@@ -184,7 +184,10 @@ export class WebComponent extends HTMLElement {
   #initializeProps() {
     if (!this.#props) {
       const { ...clone } = this;
-      this.#props = new Proxy(clone, this.#handler(this.setAttribute));
+      this.#props = new Proxy(
+        clone,
+        this.#handler((key, value) => this.setAttribute(key, value))
+      );
     }
   }
 }