diff --git a/app/database/methods.py b/app/database/methods.py
index fc1a556..1805e35 100644
--- a/app/database/methods.py
+++ b/app/database/methods.py
@@ -20,7 +20,7 @@ async def aggregate_salaries(collection: AsyncIOMotorCollection, dt_from: str, d
                     "step": 1,
                     "unit": group_type,
                     "bounds": [
-                        iso(dt_from), iso(dt_upto)
+                        iso(dt_from), iso(dt_upto) + dt.timedelta(days=int(group_type=="day"), hours=int(group_type=="hour")) * (iso(dt_upto).time() == dt.time(hour=0, minute=0, second=0))
                     ]
                 }
             }
@@ -56,4 +56,6 @@ async def aggregate_salaries(collection: AsyncIOMotorCollection, dt_from: str, d
     return {"dataset": dataset, "labels": labels}
 
 def iso(date: str) -> dt.datetime:
-    return dt.datetime.fromisoformat(date)
\ No newline at end of file
+    return dt.datetime.fromisoformat(date)
+
+