diff --git a/pyproject.toml b/pyproject.toml
index bcf83cc3..3cb31eda 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "splight-lib"
-version = "5.24.11"
+version = "5.24.12"
 description = "Splight Python Library"
 authors = [
     {name = "Splight Dev",email = "dev@splight.com"}
diff --git a/splight_lib/models/_v3/datalake_base.py b/splight_lib/models/_v3/datalake_base.py
index 7d06953c..68d1fd21 100644
--- a/splight_lib/models/_v3/datalake_base.py
+++ b/splight_lib/models/_v3/datalake_base.py
@@ -126,7 +126,7 @@ def _to_data_request(
 
 
 def _fix_dataframe_timestamp(df: pd.DataFrame) -> pd.DataFrame:
-    if df["timestamp"][0].tz is None:
+    if df["timestamp"].iloc[0].tz is None:
         df["timestamp"] = df["timestamp"].apply(
             lambda x: x.tz_localize(tz="UTC").strftime("%Y-%m-%dT%H:%M:%S.%fZ")
         )
diff --git a/uv.lock b/uv.lock
index eb8191a8..1569fb1d 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1772,7 +1772,7 @@ wheels = [
 
 [[package]]
 name = "splight-lib"
-version = "5.24.11"
+version = "5.24.12"
 source = { editable = "." }
 dependencies = [
     { name = "apscheduler" },