diff --git a/src/public_mqtt_sdl_demo/lib/mqtt_as.py b/src/public_mqtt_sdl_demo/lib/mqtt_as.py
index 8cc2cc9..2be2cb5 100644
--- a/src/public_mqtt_sdl_demo/lib/mqtt_as.py
+++ b/src/public_mqtt_sdl_demo/lib/mqtt_as.py
@@ -284,9 +284,9 @@ async def _connect(self, clean):
         await asyncio.sleep_ms(_DEFAULT_MS)
         self.dprint("Connecting to broker.")
         if self._ssl:
-            import ussl
+            import ssl
 
-            self._sock = ussl.wrap_socket(self._sock, **self._ssl_params)
+            self._sock = ssl.wrap_socket(self._sock, **self._ssl_params)
         premsg = bytearray(b"\x10\0\0\0\0\0")
         msg = bytearray(b"\x04MQTT\x04\0\0\0")  # Protocol 3.1.1
 
diff --git a/src/public_mqtt_sdl_demo/lib/umqtt/simple.py b/src/public_mqtt_sdl_demo/lib/umqtt/simple.py
index cf98b81..5d09230 100644
--- a/src/public_mqtt_sdl_demo/lib/umqtt/simple.py
+++ b/src/public_mqtt_sdl_demo/lib/umqtt/simple.py
@@ -66,9 +66,12 @@ def connect(self, clean_session=True):
         addr = socket.getaddrinfo(self.server, self.port)[0][-1]
         self.sock.connect(addr)
         if self.ssl:
-            import ussl
+            # replaced ussl with ssl due to deprecation in MicroPython 1.23.0
+            # (not PR'd on source repo, but I'm using mqtt_as in my workflows
+            # instead, anyway)
+            import ssl
 
-            self.sock = ussl.wrap_socket(self.sock, **self.ssl_params)
+            self.sock = ssl.wrap_socket(self.sock, **self.ssl_params)
         premsg = bytearray(b"\x10\0\0\0\0\0")
         msg = bytearray(b"\x04MQTT\x04\x02\0\0")
 
diff --git a/src/public_mqtt_sdl_demo/main.py b/src/public_mqtt_sdl_demo/main.py
index 66e2422..837dde9 100644
--- a/src/public_mqtt_sdl_demo/main.py
+++ b/src/public_mqtt_sdl_demo/main.py
@@ -3,11 +3,11 @@
 import gc
 import json
 import os
+import ssl
 from secrets import HIVEMQ_HOST, HIVEMQ_PASSWORD, HIVEMQ_USERNAME, PASSWORD, SSID
 from time import sleep
 
 import ntptime
-import ussl
 from as7341_sensor import Sensor
 from data_logging import initialize_sdcard, log_to_mongodb
 from machine import PWM, Pin, reset, unique_id
@@ -277,7 +277,7 @@ def callback(topic, msg, retain=None, dup=None):
             "server_side": False,
             "key": None,
             "cert": None,
-            "cert_reqs": ussl.CERT_REQUIRED,
+            "cert_reqs": ssl.CERT_REQUIRED,
             "cadata": cacert,
             "server_hostname": HIVEMQ_HOST,
         },
diff --git a/src/public_mqtt_sdl_demo/main_liquid.py b/src/public_mqtt_sdl_demo/main_liquid.py
index 246d585..af0f3d5 100644
--- a/src/public_mqtt_sdl_demo/main_liquid.py
+++ b/src/public_mqtt_sdl_demo/main_liquid.py
@@ -3,11 +3,11 @@
 import gc
 import json
 import os
+import ssl
 from secrets import HIVEMQ_HOST, HIVEMQ_PASSWORD, HIVEMQ_USERNAME, PASSWORD, SSID
 from time import sleep
 
 import ntptime
-import ussl
 from as7341_sensor import Sensor
 from data_logging import initialize_sdcard, log_to_mongodb
 from machine import PWM, Pin, reset, unique_id
@@ -345,7 +345,7 @@ def callback(topic, msg, retain=None, dup=None):
             "server_side": False,
             "key": None,
             "cert": None,
-            "cert_reqs": ussl.CERT_REQUIRED,
+            "cert_reqs": ssl.CERT_REQUIRED,
             "cadata": cacert,
             "server_hostname": HIVEMQ_HOST,
         },
diff --git a/src/public_mqtt_sdl_demo/scripts/mqtt_basic.py b/src/public_mqtt_sdl_demo/scripts/mqtt_basic.py
index 7879ae2..043006e 100644
--- a/src/public_mqtt_sdl_demo/scripts/mqtt_basic.py
+++ b/src/public_mqtt_sdl_demo/scripts/mqtt_basic.py
@@ -1,4 +1,5 @@
 import json
+import ssl
 from secrets import (
     DEVICE_NICKNAME,
     HIVEMQ_HOST,
@@ -10,7 +11,6 @@
 from time import sleep
 
 import ntptime
-import ussl
 from data_logging import get_traceback
 from netman import connectWiFi
 from sdl_demo_utils import get_onboard_led, heartbeat, sign_of_life
@@ -56,7 +56,7 @@ def callback(topic, msg, retain=None, dup=None):
         "server_side": False,
         "key": None,
         "cert": None,
-        "cert_reqs": ussl.CERT_REQUIRED,
+        "cert_reqs": ssl.CERT_REQUIRED,
         "cadata": cacert,
         "server_hostname": HIVEMQ_HOST,
     },
diff --git a/src/public_mqtt_sdl_demo/scripts/mqtt_data_logging_debug.py b/src/public_mqtt_sdl_demo/scripts/mqtt_data_logging_debug.py
index 91d9515..d94b98a 100644
--- a/src/public_mqtt_sdl_demo/scripts/mqtt_data_logging_debug.py
+++ b/src/public_mqtt_sdl_demo/scripts/mqtt_data_logging_debug.py
@@ -1,4 +1,5 @@
 import json
+import ssl
 from secrets import (
     HIVEMQ_HOST,
     HIVEMQ_PASSWORD,
@@ -13,7 +14,6 @@
 from time import sleep
 
 import ntptime
-import ussl
 from data_logging import get_traceback, log_to_mongodb
 from netman import connectWiFi
 from sdl_demo_utils import get_onboard_led, heartbeat, sign_of_life
@@ -89,7 +89,7 @@ def callback(topic, msg, retain=None, dup=None):
         "server_side": False,
         "key": None,
         "cert": None,
-        "cert_reqs": ussl.CERT_REQUIRED,
+        "cert_reqs": ssl.CERT_REQUIRED,
         "cadata": cacert,
         "server_hostname": HIVEMQ_HOST,
     },