diff --git a/CHANGELOG.md b/CHANGELOG.md
index 25a41e620..0ba284890 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,19 +1,3 @@
-- filter: normalize unicode code points to base letter (for searching ℓ, etc.)
-- core: when modifying cylinders across multiple dives, match cylinder number before comparing type
-- core: merge all properties in a dive, including current, waveheight, etc
-- core: prevent crash when merging dives without cylinders (as we might get when importing from divelogs.de)
-- core: work around bug in TecDiving dive computer reporting spurious 0 deg C water temperature in first sample
-- core: correctly parse DC_FIELD_SALINITY response; fixes incorrect water type with some dive computers, including the Mares Smart
-- Desktop: Allow more than one media file to be imported from web
-- undo: Clear undo stack when the current file is closed
-- dive computer support
- - Garmin: correctly deal with short format filenames
- - Garmin: correctly parse dive mode
- - Add support for the Seac Screen and Action
- - Add support for the Cressi Michelangelo
- - Add partial support for the new version of the Aqualung i200C with GI.... version numbers, internally named i200Cv2
- - Add initial support for the Shearwater Petrel 3 and Perdix 2
-
 
 ---
 * Always add new entries at the very top of this file above other existing entries and this note.
diff --git a/README.md b/README.md
index 85b723e7c..69f8bf4f7 100644
--- a/README.md
+++ b/README.md
@@ -11,10 +11,10 @@
 ![Build Status](https://github.com/subsurface/subsurface/workflows/Ubuntu%2020.10%20/%20Qt%205.14--/badge.svg)
 ![Build Status](https://github.com/subsurface/subsurface/workflows/openSUSE/Tumbleweed%20/%20Qt%20latest--/badge.svg)
 
-This is the README file for Subsurface 5.0.8
+This is the README file for Subsurface 5.0.9
 
 Please check the `ReleaseNotes.txt` for details about new features and
-changes since Subsurface 5.0.7 (and earlier versions).
+changes since Subsurface 5.0.8 (and earlier versions).
 
 Subsurface can be found at http://subsurface-divelog.org
 
@@ -49,10 +49,10 @@ development version) you can either get this via git or the release tar
 ball. After cloning run the following command:
 
 ```
-git checkout v5.0.8  (or whatever the last release is)
+git checkout v5.0.9  (or whatever the last release is)
 ```
 
-or download a tarball from http://subsurface-divelog.org/downloads/Subsurface-5.0.8.tgz
+or download a tarball from http://subsurface-divelog.org/downloads/Subsurface-5.0.9.tgz
 
 Detailed build instructions can be found in the INSTALL file.
 
diff --git a/ReleaseNotes/ReleaseNotes.txt b/ReleaseNotes/ReleaseNotes.txt
index 6c308bb8d..6a49522b1 100644
--- a/ReleaseNotes/ReleaseNotes.txt
+++ b/ReleaseNotes/ReleaseNotes.txt
@@ -2,6 +2,27 @@
 
 = _Subsurface_ Release Notes
 
+New in _Subsurface_ 5.0.9
+~~~~~~~~~~~~~~~~~~~~~~~~~
+- filter: normalize unicode code points to base letter (for searching ℓ, etc.)
+- core: when modifying cylinders across multiple dives, match cylinder number before comparing type
+- core: merge all properties in a dive, including current, waveheight, etc
+- core: prevent crash when merging dives without cylinders (as we might get when importing from divelogs.de)
+- core: work around bug in TecDiving dive computer reporting spurious 0 deg C water temperature in first sample
+- core: correctly parse DC_FIELD_SALINITY response; fixes incorrect water type with some dive computers, including the Mares Smart
+- desktop: allow more than one media file to be imported from web
+- desktop: improve UX for cloud email/password checking
+- undo: clear undo stack when the current file is closed
+- dive computer support
+ - Garmin: correctly deal with short format filenames
+ - Garmin: correctly parse dive mode
+ - Add support for the Seac Screen and Action
+ - Add support for the Cressi Michelangelo
+ - Add support for the new version of the Aqualung i200C
+ - Add support for the Shearwater Petrel 3 and Perdix 2
+ - Add support for the Ratio iX3M 2
+ - Add support for the Sherwood Amphos Air 2.0
+
 New in _Subsurface_ 5.0.8
 ~~~~~~~~~~~~~~~~~~~~~~~~~
 - core: add support for separator characters when using degree-style coordinates