diff --git a/thunderbolt/client/s3_client.py b/thunderbolt/client/s3_client.py
index 3401662..aa00d6b 100644
--- a/thunderbolt/client/s3_client.py
+++ b/thunderbolt/client/s3_client.py
@@ -34,7 +34,7 @@ def get_tasks(self) -> List[Dict[str, Any]]:
             n = n.split('_')
 
             if self.use_cache:
-                cache = self.local_cache.get(x['key'])
+                cache = self.local_cache.get(x['Key'])
                 if cache:
                     tasks_list.append(cache)
                     continue
@@ -49,7 +49,7 @@ def get_tasks(self) -> List[Dict[str, Any]]:
                 }
                 tasks_list.append(params)
                 if self.use_cache:
-                    self.local_cache.dump(x['key'], params)
+                    self.local_cache.dump(x['Key'], params)
             except Exception:
                 continue