diff --git a/changelog.d/344.feature b/changelog.d/344.feature
new file mode 100644
index 00000000..bbc908d1
--- /dev/null
+++ b/changelog.d/344.feature
@@ -0,0 +1 @@
+Add a new `convert_device_token_to_hex` configuration option for APNs apps, to allow disabling the conversion of device tokens from base64 to hex.
\ No newline at end of file
diff --git a/sygnal.yaml.sample b/sygnal.yaml.sample
index 0a2c9b3c..b62d564f 100644
--- a/sygnal.yaml.sample
+++ b/sygnal.yaml.sample
@@ -197,6 +197,11 @@ apps:
   #  #
   #  # The default is 'production'. Uncomment to use the sandbox instance.
   #  #platform: sandbox
+  #  #
+  #  # Specifies whether to convert the device push token from base 64 to hex.
+  #  # Defaults to True, set this to False if your client library provides a
+  #  # push token in hex format.
+  #  #convert_device_token_to_hex: false
 
   # This is an example GCM/FCM push configuration.
   #
diff --git a/sygnal/apnspushkin.py b/sygnal/apnspushkin.py
index e47374d7..0dd588b1 100644
--- a/sygnal/apnspushkin.py
+++ b/sygnal/apnspushkin.py
@@ -242,7 +242,12 @@ async def _dispatch_request(
         log.info(f"Sending as APNs-ID {notif_id}")
         span.set_tag("apns_id", notif_id)
 
-        device_token = base64.b64decode(device.pushkey).hex()
+        # Some client libraries will provide the push token in hex format already. Avoid
+        # attempting to convert from base 64 to hex.
+        if self.get_config("convert_device_token_to_hex", bool, True):
+            device_token = base64.b64decode(device.pushkey).hex()
+        else:
+            device_token = device.pushkey
 
         request = NotificationRequest(
             device_token=device_token,