diff --git a/conf/app.src b/conf/app.src
index 07eea55..dd12137 100644
--- a/conf/app.src
+++ b/conf/app.src
@@ -1,5 +1,5 @@
-SOURCE_URL=https://github.com/roundcube/roundcubemail/releases/download/1.6.2/roundcubemail-1.6.2.tar.gz
-SOURCE_SUM=5c0b0d798c3074c7bb141ae3f79d2ae1136b9e047b014351b69522656162388b
+SOURCE_URL=https://github.com/roundcube/roundcubemail/releases/download/1.6.3/roundcubemail-1.6.3.tar.gz.asc
+SOURCE_SUM=7e6d740999aa1848811fca43a50c24952f3cb5fb452a44146f9c053c06272195
 SOURCE_SUM_PRG=sha256sum
 SOURCE_FORMAT=tar.gz
 SOURCE_IN_SUBDIR=true
diff --git a/manifest.json b/manifest.json
index 061c4aa..93f17f1 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "Open Source Webmail software",
         "fr": "Webmail Open Source"
     },
-    "version": "1.6.2~ynh1",
+    "version": "1.6.3~ynh1",
     "url": "https://roundcube.net/",
     "upstream": {
         "license": "GPL-3.0-only",
@@ -31,7 +31,7 @@
         "mysql"
     ],
     "arguments": {
-        "install" : [
+        "install": [
             {
                 "name": "domain",
                 "type": "domain"
@@ -49,7 +49,12 @@
                     "en": "Choose the application language",
                     "fr": "Choisissez la langue de l'application"
                 },
-                "choices": ["de_DE", "en_GB", "fr_FR", "it_IT"],
+                "choices": [
+                    "de_DE",
+                    "en_GB",
+                    "fr_FR",
+                    "it_IT"
+                ],
                 "default": "en_GB"
             },
             {