diff --git a/parser/__init__.py b/parser/__init__.py
index 0502502..cd4b8b3 100644
--- a/parser/__init__.py
+++ b/parser/__init__.py
@@ -1,10 +1,12 @@
 from .address import split_addresses
 from .building_id import (
+    async_fetch_building_id,
     async_fetch_building_ids,
     concurrent_fetch_builing_ids,
     fetch_builing_ids,
     get_building_id,
 )
+from .lenenergo import LenenergoParser
 from .preprocess import (
     COL_NS,
     ICOL_NS,
@@ -12,20 +14,20 @@ from .preprocess import (
     preprocess_df,
     preprocess_read_df,
 )
-from .lenenergo import LenenergoParser
 from .util import pipeline
 
 __all__ = (
-    "LenenergoParser",
-    "split_addresses",
-    "get_building_id",
-    "fetch_builing_ids",
+    "async_fetch_building_id",
     "async_fetch_building_ids",
-    "concurrent_fetch_builing_ids",
-    "preprocess_df",
     "COL_NS",
-    "ICOL_NS",
-    "preprocess_read_df",
+    "concurrent_fetch_builing_ids",
+    "fetch_builing_ids",
+    "get_building_id",
     "group_by_index",
+    "ICOL_NS",
+    "LenenergoParser",
     "pipeline",
+    "preprocess_df",
+    "preprocess_read_df",
+    "split_addresses",
 )
diff --git a/parser/preprocess.py b/parser/preprocess.py
index 61fa8d6..5de5c98 100644
--- a/parser/preprocess.py
+++ b/parser/preprocess.py
@@ -34,6 +34,8 @@ def preprocess_df(df: pd.DataFrame) -> pd.DataFrame:
         )
         df.drop(columns=[f"{a}_date", f"{a}_time"], inplace=True)
 
+    df = df.convert_dtypes()
+
     return df