diff --git a/examples/wiznet5k_aio_post.py b/examples/wiznet5k_aio_post.py
index 07f7869..96525bd 100644
--- a/examples/wiznet5k_aio_post.py
+++ b/examples/wiznet5k_aio_post.py
@@ -1,6 +1,7 @@
 # SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
 # SPDX-License-Identifier: MIT
 
+from os import getenv
 import time
 import board
 import busio
@@ -9,12 +10,10 @@
 import adafruit_requests
 from adafruit_wiznet5k.adafruit_wiznet5k import WIZNET5K
 
-# Get Adafruit.io details from a secrets.py file
-try:
-    from secrets import secrets
-except ImportError:
-    print("WiFi secrets are kept in secrets.py, please add them there!")
-    raise
+# Get Adafruit IO keys, ensure these are setup in settings.toml
+# (visit io.adafruit.com if you need to create an account, or if you need your Adafruit IO key.)
+aio_username = getenv("ADAFRUIT_AIO_USERNAME")
+aio_key = getenv("ADAFRUIT_AIO_KEY")
 
 cs = DigitalInOut(board.D10)
 spi_bus = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)
@@ -34,13 +33,9 @@
     feed = "test"
     payload = {"value": data}
     response = requests.post(
-        "http://io.adafruit.com/api/v2/"
-        + secrets["aio_username"]
-        + "/feeds/"
-        + feed
-        + "/data",
+        f"http://io.adafruit.com/api/v2/{aio_username}/feeds/{feed}/data",
         json=payload,
-        headers={"X-AIO-KEY": secrets["aio_key"]},
+        headers={"X-AIO-KEY": aio_key},
     )
     print(response.json())
     response.close()