diff --git a/CHANGELOG.md b/CHANGELOG.md
index dc9645f..36e16c0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## v0.9.0
 
+## Breaking changes
+Now using poetry for packaging and installing! It's now easier to maintain and publish package, but means changes to use prismedia.  
+Prismedia is now seen as a python module, so you may now use `python -m prismedia` (or even directly `prismedia` if you install with poetry) instead of `./prismedia_upload.py`.
+
 ### Features
  - Prismedia now uses [poetry](https://python-poetry.org) to allow easier installation usage and build, see the README
  - Add two new options to schedule video by platform. You may now use youtubeAt and peertubeAt to prepare previews
diff --git a/README.md b/README.md
index 6b9e915..5be531c 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,7 @@ or creates one specific to the project if no virtualenv is currently active
 ## Configuration
 
 Generate sample files with `python -m prismedia.genconfig`.  
-Then edit `peertube_secret` and `youtube_secret.json` with your credentials.
+Then edit `peertube_secret` and `youtube_secret.json` with your credentials. (see below)
 
 ### Peertube
 Set your credentials, peertube server URL.  
@@ -162,7 +162,7 @@ Languages:
   - [x] enabling/disabling comment (Peertube only as Youtube API does not support it)
   - [x] nsfw (Peertube only as Youtube API does not support it)
   - [x] set default language
-  - [x] thumbnail/preview
+  - [x] thumbnail
   - [x] multiple lines description (see [issue 4](https://git.lecygnenoir.info/LecygneNoir/prismedia/issues/4))
   - [x] add videos to playlist
   - [x] create playlist