diff --git a/README.md b/README.md
index f65cb5f..9c5351e 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ If you don't have YunoHost, please see [here](https://yunohost.org/#/install) to
 [Roundcube](https://roundcube.net/) is a browser-based multilingual IMAP client with
 an application-like user interface.
 
-**Shipped version:** 1.3.9
+**Shipped version:** 1.4.0-rc1
 
 ## Screenshots
 
diff --git a/conf/app.src b/conf/app.src
index a5f0116..8751cfb 100644
--- a/conf/app.src
+++ b/conf/app.src
@@ -1,5 +1,5 @@
-SOURCE_URL=https://github.com/roundcube/roundcubemail/releases/download/1.3.9/roundcubemail-1.3.9.tar.gz
-SOURCE_SUM=7775176dfcb1e4ed39586d95a4fad0ee7b4a582e071233b4e3bf7d59040c1b5a
+SOURCE_URL=https://github.com/roundcube/roundcubemail/releases/download/1.4-rc1/roundcubemail-1.4-rc1.tar.gz
+SOURCE_SUM=73041cffbb6c5c56f50d4875d50465a36b5afdaf2a39af2737e4628f34c2a948
 SOURCE_SUM_PRG=sha256sum
 SOURCE_FORMAT=tar.gz
 SOURCE_IN_SUBDIR=true
diff --git a/manifest.json b/manifest.json
index 067dd99..3012672 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "Open Source Webmail software",
         "fr": "Webmail Open Source"
     },
-    "version": "1.3.9~ynh1",
+    "version": "1.4.0-rc1~ynh1",
     "url": "https://roundcube.net/",
     "license": "GPL-3.0-only",
     "maintainer": {