diff --git a/.github/workflows/fetch_data.yml b/.github/workflows/fetch_data.yml
index 9d93705..a674afd 100644
--- a/.github/workflows/fetch_data.yml
+++ b/.github/workflows/fetch_data.yml
@@ -1,6 +1,12 @@
 name: Fetch Data
 
-on: [push]
+on:
+    push:
+        branches:
+            - main
+    schedule:
+        # every night at 01:30 UTC
+      - cron:  "30 1 * * *"
 
 jobs:
     get_data:
diff --git a/.github/workflows/pylint.yml b/.github/workflows/pylint.yml
index 47a8bce..7ac24db 100644
--- a/.github/workflows/pylint.yml
+++ b/.github/workflows/pylint.yml
@@ -7,7 +7,7 @@ jobs:
         runs-on: ubuntu-latest
         strategy:
             matrix:
-                python-version: ["3.8", "3.9", "3.10"]
+                python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
         steps:
             - uses: actions/checkout@v4
 
diff --git a/src/__main__.py b/src/__main__.py
index ac28de1..92ccb27 100644
--- a/src/__main__.py
+++ b/src/__main__.py
@@ -6,7 +6,7 @@
 from src.logs import Logs
 
 if __name__ == '__main__':
-    Logs().log_to_stderr().log_to_file(
+    Logs(enable=True).log_to_stderr().log_to_file(
         sink='logs/irish_weather.log',
         level='DEBUG',
         backtrace=True,
diff --git a/src/fetch_weather_data.py b/src/fetch_weather_data.py
index e7d474f..20bb10c 100644
--- a/src/fetch_weather_data.py
+++ b/src/fetch_weather_data.py
@@ -37,7 +37,7 @@ def __init__(
         data_formats: list[str] | None = None,
         max_rows: int = MAX_ROWS,
         min_date: str = MIN_DATE,
-        overwrite_files: bool = False,
+        overwrite_files: bool = True,
         sleep_delay: int = SLEEP_DELAY,
         station_url: str = STATION_DATA_URL,
         enable_logging: bool = True,
@@ -66,7 +66,7 @@ def __init__(
         if enable_logging:
             Logs(enable=enable_logging).log_to_stderr()
 
-        self.df_all_stations = None
+        self.df_all_stations = pd.DataFrame()
         self.first_warning = True
 
     def fetch_data(self):