diff --git a/process/backup-eressea b/process/backup-eressea
index 12ced938c..3944a9221 100755
--- a/process/backup-eressea
+++ b/process/backup-eressea
@@ -4,6 +4,13 @@ if [ -z $ERESSEA ] ; then
   echo "The ERESSEA environment variable is not set. Assuming $ERESSEA."
 fi
 GAME=$1
+
+upload() {
+  SRC="$1"
+  DST=$(basename "$SRC")
+  echo put "$SRC" "$DST" | cadaver "https://dav.box.com/dav/Eressea/game-$GAME/"
+}
+
 if [ ! -d $ERESSEA/game-$GAME ]; then
   echo "No such game: game-$GAME."
   exit 1
@@ -26,7 +33,7 @@ fi
 if [ -e reports/reports.txt ] ; then
   echo "backup reports $TURN, game $GAME"
   tar cjf backup/$TURN-reports.tar.bz2 reports
-  curl -s -n -T backup/$TURN-reports.tar.bz2 https://dav.box.com/dav/Eressea/game-$GAME/$TURN-reports.tar.bz2
+  upload backup/$TURN-reports.tar.bz2
 fi
 files="data/$TURN.dat parteien.full parteien"
 if [ -e orders.$TURN ]; then
@@ -34,5 +41,5 @@ files="$files orders.$TURN"
 fi
 echo "backup turn $TURN, game $GAME, files: $files"
 tar cjf backup/$TURN.tar.bz2 $files
-curl -s -n -T backup/$TURN.tar.bz2 https://dav.box.com/dav/Eressea/game-$GAME/$TURN.tar.bz2
-#curl -s -n -T eressea.db https://dav.box.com/dav/Eressea/eressea.db
+upload backup/$TURN.tar.bz2
+
diff --git a/src/kernel/version.c b/src/kernel/version.c
index adbb78e18..e0eda3631 100644
--- a/src/kernel/version.c
+++ b/src/kernel/version.c
@@ -8,7 +8,7 @@
 
 #ifndef ERESSEA_VERSION
 /* the version number, if it was not passed to make with -D */
-#define ERESSEA_VERSION "3.20.0"
+#define ERESSEA_VERSION "3.21.0"
 #endif
 
 const char *eressea_version(void) {