diff --git a/changelog.md b/changelog.md
index a1f5aa1..16b0f8b 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 2.1.1
+- Changes to the `manifest-dev-tool update` command:
+  - Add `--use-short-url` option. Using this option decreases manifest size.
+    **Note:** The device must be configured to use CoAP.
+  - Add `--gw-preset` option, which enables presetting an access key in a `.pelion-dev-presets.yaml` file in the home directory.
+  - Print campaign summary on tool exit.
+- Improve the tool help and the `README.md`.
+
 ## 2.1.0
 - Stop using deprecated `mbed-cloud-sdk` package
 - Introduce support for `upload-jobs` for uploading FW image - allow
diff --git a/manifesttool/dev_tool/actions/create.py b/manifesttool/dev_tool/actions/create.py
index 52a8a74..ca2814e 100644
--- a/manifesttool/dev_tool/actions/create.py
+++ b/manifesttool/dev_tool/actions/create.py
@@ -90,7 +90,8 @@ def register_parser(parser: argparse.ArgumentParser,
             optional.add_argument(
                 '-u', '--use-short-url',
                 action='store_true',
-                help='Use a short candidate payload URL in the manifest.'
+                help='Use a short candidate payload URL in the manifest. '
+                     'Note: the device must be configured to use CoAP.'
             )
         optional.add_argument(
             '-m', '--sign-image',