diff --git a/pyconkr/external_apis/pretalx/client.py b/pyconkr/external_apis/pretalx/client.py
index 838e602..6b39dc6 100644
--- a/pyconkr/external_apis/pretalx/client.py
+++ b/pyconkr/external_apis/pretalx/client.py
@@ -48,10 +48,7 @@ def list_sessions(self, event_name: str, only_confirmed: bool = True) -> dict:
         try:
             result = self._request("GET", endpoint)
             result.raise_for_status()
-
-            parsed_result = PretalxPaginatedSessionSerializer(data=result.json())
-            parsed_result.is_valid(raise_exception=True)
-            return parsed_result.validated_data
+            return result.json()
         except Exception as e:
             raise PretalxException("세션 목록을 가져오지 못했습니다, 잠시 후에 다시 시도해주세요.") from e
 
@@ -62,10 +59,7 @@ def retrieve_session(self, event_name: str, session_id: int) -> dict:
         try:
             result = self._request("GET", endpoint)
             result.raise_for_status()
-
-            parsed_result = PretalxSessionSerializer(data=result.json())
-            parsed_result.is_valid(raise_exception=True)
-            return parsed_result.validated_data
+            return result.json()
         except Exception as e:
             raise PretalxException("세션을 가져오지 못했습니다, 잠시 후에 다시 시도해주세요.") from e