diff --git a/nio/api.py b/nio/api.py
index b25b1b92..2d1cb24b 100644
--- a/nio/api.py
+++ b/nio/api.py
@@ -1017,7 +1017,7 @@ def update_device(access_token, device_id, content):
                 updated for the device.
         """
         query_parameters = {"access_token": access_token}
-        path = "devices/{}".format(device_id)
+        path = "devices/{}".format(quote(device_id))
 
         return (
             "PUT",