diff --git a/thermostat.py b/thermostat.py
index 6c398d7..0911131 100644
--- a/thermostat.py
+++ b/thermostat.py
@@ -13,6 +13,7 @@ import time
 import requests
 
 # This code has been written for
+# python3                        3.11.2-1+b1
 # python3-flask                  2.2.2-3                   all          micro web framework based on Werkzeug and Jinja2 - Python 3.x
 # python3-flask-migrate          4.0.4-1                   all          SQLAlchemy migrations for Flask using Alembic and Python 3
 # python3-flask-sqlalchemy       3.0.3-1                   all          adds SQLAlchemy support to your Python 3 Flask application
@@ -120,7 +121,7 @@ def get_metric(metric, current_time, interval):
   try:
     r = requests.get(url)
     data = json.loads(r.text)
-    timestamp = getDateTimeFromISO8601String(data['timestamp']).replace(tzinfo=timezone.utc).timestamp()
+    timestamp = datetime.fromisoformat(data['timestamp']).replace(tzinfo=timezone.utc).timestamp()
     if current_time - timestamp < interval * 2:
       return data['value']
     else:
@@ -138,7 +139,7 @@ def get_forced_mode():
   #cur.execute("SELECT value, timestamp FROM set_mode WHERE name='mode'")
   #row = cur.fetchone()
   data = dict(zip(['value', 'timestamp'], row))
-  timestamp = getDateTimeFromISO8601String(data['timestamp']).replace(tzinfo=timezone.utc).timestamp()
+  timestamp = datetime.fromisoformat(data['timestamp']).replace(tzinfo=timezone.utc).timestamp()
   # We ignore old targets but never ignore absence modes
   if data['value'] in targets and time.time() - timestamp > forced_mode_duration:
     logging.debug("Ignoring old set mode.")
@@ -330,14 +331,7 @@ logging.info("====== Ended successfully ======")
 #from http.server import BaseHTTPRequestHandler
 #import threading
 #import socketserver
-#
-## As of Python 3.7 there is a method datetime.fromisoformat() which is exactly the reverse for isoformat().
-## So this will no longer be necessary.
-#from dateutil import parser
-#def getDateTimeFromISO8601String(s):
-#    d = parser.parse(s)
-#    return d
-#
+
 #from threading import Lock
 #
 #xprint_lock = Lock()