diff --git a/quassel/PKGBUILD b/quassel/PKGBUILD
index 1e3b0203b..8af5535b6 100644
--- a/quassel/PKGBUILD
+++ b/quassel/PKGBUILD
@@ -1,5 +1,5 @@
 pkgname=quassel
-pkgver=0.12.5
+pkgver=0.13.0
 pkgrel=1
 pkgdesc="Next-generation distributed IRC client"
 arch=('x86_64')
@@ -15,7 +15,7 @@ source=("https://quassel-irc.org/pub/quassel-${pkgver}.tar.bz2"
         'quassel.conf')
 install=quassel.install
 backup=(etc/conf.d/quassel.conf)
-sha1sums=('ad30d49ab670ba8927e0e0caa8ac36b29f08bd0d'
+sha1sums=('e53400ad93b94ded5f04c74e21df72ec576795df'
           '40b801ad664e9e0f0d5f1260f7545b6842dd11e8'
           '575d09f165f12ba35e560be54c8e1cd92321bb4b')
          
diff --git a/quassel/quassel.install b/quassel/quassel.install
index 18a9dda68..83cc490c4 100644
--- a/quassel/quassel.install
+++ b/quassel/quassel.install
@@ -1,7 +1,13 @@
 post_install() {
   useradd -r -s /bin/sh -d /var/lib/quassel quassel
   mkdir -p /var/lib/quassel && chown -R quassel:quassel /var/lib/quassel
-  xdg-icon-resource forceupdate --theme hicolor &> /dev/null
+}
+
+post_upgrade() {
+  echo "Please be aware that both the database schema and the config file formats have been updated since 0.12. Quassel will automatically upgrade both once the 
+new version is started for the first time, however NO ROLLBACK IS POSSIBLE, so do make a backup before starting the new version! The upgrade may take a long 
+time (up to several hours) if your database is (un)reasonably large, during which the core or mono client cannot be used. The upgrade may also temporarily 
+require up to double the disk space. Do not interrupt the upgrade process, otherwise your database may become corrupted!"
 }
 
 pre_remove() {