diff --git a/src/lib/api.ts b/src/lib/api.ts
index 83fd793..0c409de 100644
--- a/src/lib/api.ts
+++ b/src/lib/api.ts
@@ -214,16 +214,26 @@ export async function getChaptersByHid(
 
     for (const chap of rawChapters) {
       try {
-        if (!chap.id || !chap.chap || !chap.updated_at) {
+        // Add created_at check
+        if (!chap.id || !chap.chap || !chap.created_at) {
           console.warn(`Skipping chapter with missing fields in ${hid}:`, chap);
           continue;
         }
         
+        // Validate both dates
+        const isValidCreated = !isNaN(Date.parse(chap.created_at));
+        const isValidUpdated = !isNaN(Date.parse(chap.updated_at));
+        
+        if (!isValidCreated || !isValidUpdated) {
+          console.warn(`Invalid dates for chapter ${chap.id}`);
+          continue;
+        }
+        
         chapters.push({
           id: chap.id,
           chap: chap.chap.toString(),
           title: chap.title || `Chapter ${chap.chap}`,
-          updated_at: chap.updated_at,
+          created_at: new Date(chap.created_at).toISOString(), // Use created_at
           md_comics: {
             title: comicTitle,
             slug: slug,
@@ -231,7 +241,7 @@ export async function getChaptersByHid(
           }
         });
       } catch (e) {
-        console.error(`Error processing chapter ${chap.id} for ${hid}:`, e);
+        console.error(`Error processing chapter ${chap.id}:`, e);
       }
     }
 
@@ -352,7 +362,7 @@ export async function getChaptersForSlugs(
   const deduplicatedChapters = deduplicateChapters(allChapters);
   return deduplicatedChapters.sort((a, b) => 
     parseFloat(b.chap) - parseFloat(a.chap) ||
-    new Date(b.updated_at).getTime() - new Date(a.updated_at).getTime()
+    new Date(b.created_at).getTime() - new Date(a.created_at).getTime()
   );
 }
 
diff --git a/src/lib/types.ts b/src/lib/types.ts
index e9df151..3aea2a7 100644
--- a/src/lib/types.ts
+++ b/src/lib/types.ts
@@ -38,4 +38,16 @@ export interface Announcement {
     text: string;
     url: string;
   };
+}
+
+export interface ChapterDetail {
+  id: string;
+  chap: string;
+  title: string;
+  created_at: string;
+  md_comics: {
+    title: string;
+    slug: string;
+    md_covers?: ComicCover[];
+  };
 }
\ No newline at end of file
diff --git a/src/pages/rss/[feedId].xml.ts b/src/pages/rss/[feedId].xml.ts
index b2d16dd..8b04eaa 100644
--- a/src/pages/rss/[feedId].xml.ts
+++ b/src/pages/rss/[feedId].xml.ts
@@ -48,7 +48,19 @@ export const GET: APIRoute = async ({ params, request }) => {
   });
 
   chapters.forEach((chapter) => {
+    if (!chapter?.created_at) {
+      console.error('Chapter missing created_at:', chapter);
+      return;
+    }
+
     const chapterUrl = `https://comick.io/comic/${chapter.md_comics.slug}`;
+    
+    const rawDate = chapter.created_at.endsWith('Z') 
+      ? chapter.created_at 
+      : `${chapter.created_at}Z`;
+    
+    const pubDate = isValidDate(rawDate) ? new Date(rawDate) : new Date();
+
     feed.addItem({
       title: `${chapter.md_comics.title} - Chapter ${chapter.chap}`,
       id: `${chapter.md_comics.slug}-${chapter.chap}`,
@@ -64,7 +76,7 @@ export const GET: APIRoute = async ({ params, request }) => {
           <p>New chapter available: Chapter ${chapter.chap}</p>
         </div>
       `,
-      date: new Date(chapter.updated_at),
+      date: pubDate,
     });
   });
 
@@ -73,4 +85,8 @@ export const GET: APIRoute = async ({ params, request }) => {
       'Content-Type': 'application/xml; charset=utf-8',
     },
   });
-}; 
\ No newline at end of file
+};
+
+function isValidDate(dateString: string): boolean {
+  return !isNaN(Date.parse(dateString));
+} 
\ No newline at end of file