diff --git a/web/src/giscus.ts b/web/src/giscus.ts
index 2bc8f18a..dcb42a4f 100644
--- a/web/src/giscus.ts
+++ b/web/src/giscus.ts
@@ -24,7 +24,6 @@ export class GiscusWidget extends LitElement {
     iframe {
       width: 100%;
       border: none;
-      color-scheme: normal;
       min-height: 150px;
     }
   `;
@@ -309,11 +308,11 @@ export class GiscusWidget extends LitElement {
       backLink,
     };
 
+    const host = this.host || this.GISCUS_DEFAULT_HOST;
     const locale = this.lang ? `/${this.lang}` : '';
-
     const searchParams = new URLSearchParams(params);
 
-    return `${this.host}${locale}/widget?${searchParams}`;
+    return `${host}${locale}/widget?${searchParams}`;
   }
 
   render() {
@@ -324,6 +323,7 @@ export class GiscusWidget extends LitElement {
         ${ref(this._iframeRef)}
         src=${this.getIframeSrc()}
         loading=${this.loading}
+        allow="clipboard-write"
         part="iframe"
       ></iframe>
     `;