diff --git a/pyposeidon/schism.py b/pyposeidon/schism.py
index 427da1a3..5dbbc799 100644
--- a/pyposeidon/schism.py
+++ b/pyposeidon/schism.py
@@ -1517,11 +1517,11 @@ def results(self, **kwargs):
             date.columns = ["year", "month", "day", "hour", "utc"]  # rename the columns
             # set the start timestamp
             sdate = pd.Timestamp(
-                year=date.year.values[0],
-                month=date.month.values[0],
-                day=date.day.values[0],
-                hour=date.hour.values[0],
-                tz=date.utc.values[0],
+                year=int(date.year.values[0]),
+                month=int(date.month.values[0]),
+                day=int(date.day.values[0]),
+                hour=int(date.hour.values[0]),
+                tz=int(date.utc.values[0]),
             )
 
             logger.info("done with generic variables \n")
diff --git a/pyproject.toml b/pyproject.toml
index bb95122a..0055a491 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -47,7 +47,7 @@ joblib = "*"
 llvmlite = "*"
 netCDF4 = "*"
 numpy = ">=1.20, <2.0"
-pandas = "<2"
+pandas = "*"
 psutil = "*"
 pydap = ">=3.4.0"
 pyresample = "*"