diff --git a/examples/demo/Toggle.js b/examples/demo/Toggle.js
new file mode 100644
index 0000000..cecadb9
--- /dev/null
+++ b/examples/demo/Toggle.js
@@ -0,0 +1,16 @@
+import { WebComponent, html } from "../../src/index.js";
+
+class Toggle extends WebComponent {
+  static props = {
+    toggle: false,
+  };
+  get template() {
+    return html`
+      <button onClick=${() => (this.props.toggle = !this.props.toggle)}>
+        ${this.props.toggle}
+      </button>
+    `;
+  }
+}
+
+customElements.define("my-toggle", Toggle);
diff --git a/examples/demo/index.html b/examples/demo/index.html
index 4d01297..9a4fb9c 100644
--- a/examples/demo/index.html
+++ b/examples/demo/index.html
@@ -8,8 +8,12 @@
     <script type="module" src="./SimpleText.mjs"></script>
     <script type="module" src="./BooleanPropTest.mjs"></script>
     <script type="module" src="./Counter.mjs"></script>
+    <script type="module" src="./Toggle.js"></script>
   </head>
   <body>
+    <my-toggle></my-toggle>
+    <my-toggle toggle></my-toggle>
+    <hr />
     <hello-world emotion="sad"></hello-world>
     <my-counter></my-counter>
     <p>
diff --git a/src/WebComponent.js b/src/WebComponent.js
index d78e18b..5692174 100644
--- a/src/WebComponent.js
+++ b/src/WebComponent.js
@@ -168,15 +168,12 @@ export class WebComponent extends HTMLElement {
   }
 
   #initializeProps() {
-    let initialProps = {};
-    if (this.constructor.props) {
-      initialProps = this.constructor.props;
-      Object.keys(initialProps).forEach((camelCase) => {
-        const value = initialProps[camelCase];
-        this.#typeMap[camelCase] = typeof value;
-        this.setAttribute(getKebabCase(camelCase), serialize(value));
-      });
-    }
+    let initialProps = structuredClone(this.constructor.props) ?? {};
+    Object.keys(initialProps).forEach((camelCase) => {
+      const value = initialProps[camelCase];
+      this.#typeMap[camelCase] = typeof value;
+      this.setAttribute(getKebabCase(camelCase), serialize(value));
+    });
     if (!this.#props) {
       this.#props = new Proxy(
         initialProps,
