diff --git a/transcription_dict.py b/transcription_dict.py
index e33531e..112adba 100644
--- a/transcription_dict.py
+++ b/transcription_dict.py
@@ -1,10 +1,11 @@
 import time
 import threading
+from typing import Dict, Tuple, Any
 
 class TranscriptionDict:
     def __init__(self, max_size=1000):
         self.max_size = max_size
-        self._dict = {}
+        self._dict: Dict[str, Tuple[str, float]] = {}
 
         # Start a thread to clean expired items every 3 minutes
         self._clean_thread = threading.Thread(target=self._clean_expired_items_periodically)
@@ -15,10 +16,10 @@ class TranscriptionDict:
         return len(self._dict)
 
     def get(self, key):
-        return self._dict[key]
+        return self._dict[key]['value']
 
     def set(self, key, value):
-        self._dict[key] = value
+        self._dict[key] = {'value': value, 'timestamp': time.time()}
         if len(self._dict) > self.max_size:
             self._clean_expired_items()
 
@@ -30,6 +31,7 @@ class TranscriptionDict:
         expired_items = [k for k, v in self._dict.items() if now - v[1] >= 180] # 180 seconds = 3 minutes
         for key in expired_items:
             del self._dict[key]
+        print(f"Cleaned {len(expired_items)} expired items from the cache")
 
     def _clean_expired_items_periodically(self):
         while True: