diff --git a/serenata_toolbox/chamber_of_deputies/reimbursements_cleaner.py b/serenata_toolbox/chamber_of_deputies/reimbursements_cleaner.py
index <HASH>..<HASH> 100644
--- a/serenata_toolbox/chamber_of_deputies/reimbursements_cleaner.py
+++ b/serenata_toolbox/chamber_of_deputies/reimbursements_cleaner.py
@@ -130,8 +130,8 @@ class ReimbursementsCleaner:
     def aggregate_multiple_payments(self):
         self.data = pd.concat([
             self._house_payments(),
-            self._non_house_payments(),
-        ])
+            self._non_house_payments()
+        ], sort=False)
 
     def save(self):
         file_path = os.path.join(self.path, f'reimbursements-{self.year}.csv')
Add sort argument to Pandas concat

Following a warning regarding new behavior:

In a future version of pandas pandas.concat() will no longer sort the non-concatenation axis when it is not already aligned.