diff --git a/adafruit_fona/adafruit_fona.py b/adafruit_fona/adafruit_fona.py
index fc838fa..a51bfd5 100644
--- a/adafruit_fona/adafruit_fona.py
+++ b/adafruit_fona/adafruit_fona.py
@@ -27,10 +27,15 @@
 from simpleio import map_range
 
 try:
-    from typing import Optional, Tuple, Union, Literal
+    from typing import Optional, Tuple, Union
     from circuitpython_typing import ReadableBuffer
     from busio import UART
     from digitalio import DigitalInOut
+
+    try:
+        from typing import Literal
+    except ImportError:
+        from typing_extensions import Literal
 except ImportError:
     pass
 
diff --git a/adafruit_fona/fona_3g.py b/adafruit_fona/fona_3g.py
index eedad3e..5ebd1e5 100755
--- a/adafruit_fona/fona_3g.py
+++ b/adafruit_fona/fona_3g.py
@@ -24,9 +24,13 @@
 from .adafruit_fona import FONA, REPLY_OK
 
 try:
-    from typing import Optional, Tuple, Union, Literal
+    from typing import Optional, Tuple, Union
     from busio import UART
     from digitalio import DigitalInOut
+    try:
+        from typing import Literal
+    except ImportError:
+        from typing_extensions import Literal
 except ImportError:
     pass