diff --git a/modules/misc.py b/modules/misc.py
index fb26ca6..724cda7 100644
--- a/modules/misc.py
+++ b/modules/misc.py
@@ -4,29 +4,29 @@ from typing import Set, List
 class ProcessedPostsManager:
     def __init__(self, file_path: str = "processed.txt"):
         self.file_path = file_path
-        self.processed_posts: Set[int] = self._load()
+        self.processed_posts: Set[str] = self._load()
 
-    def _load(self) -> Set[int]:
+    def _load(self) -> Set[str]:
         try:
             with open(self.file_path, "r", encoding="utf-8") as processed:
-                return set(processed.readlines())
+                return {line.strip() for line in processed if line.strip()}
 
         except:
             return set()
 
     def _save(self):
         with open(self.file_path, "w", encoding="utf-8") as processed:
-            processed.writelines(lines=self.processed_posts)
+            processed.write("\n".join(self.processed_posts))
 
     def is_processed(self, post_id: int) -> bool:
-        return post_id in self.processed_posts
+        return str(post_id) in self.processed_posts
 
     def mark_processed(self, post_id: int):
-        self.processed_posts.add(post_id)
+        self.processed_posts.add(str(post_id))
         self._save()
 
     def add_existing_posts(self, post_ids: List[int]):
         for post_id in post_ids:
-            self.processed_posts.add(post_id)
+            self.processed_posts.add(str(post_id))
 
         self._save()