diff --git a/CHANGELOG.md b/CHANGELOG.md
index d145dc505..a8e73d395 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,18 @@
+## 3.9.1-beta.1 - 2018-08-16
+
+Improvements for all users:
+
+- Fix synchronization bugs when merging and overwriting folders.
+
+Improvements for macOS users:
+
+- Better support for APFS
+
+See also [known issues](https://github.com/cozy-labs/cozy-desktop/blob/master/KNOWN_ISSUES.md).
+
+Happy syncing!
+
+
 ## 3.9.0 - 2018-07-20
 
 Improvements for all users:
diff --git a/package.json b/package.json
index 4b864749c..d41d045fa 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "CozyDrive",
   "productName": "Cozy Drive",
   "private": true,
-  "version": "3.9.0",
+  "version": "3.9.1-beta.1",
   "description": "Cozy Drive is a synchronization tool for your files and folders with Cozy Cloud.",
   "homepage": "https://github.com/cozy-labs/cozy-desktop",
   "author": "Cozy Cloud <contact@cozycloud.cc> (https://cozycloud.cc/)",