diff --git a/bin/dump_data.sh b/bin/dump_data.sh
index 6f3229da..7d2bcf9e 100755
--- a/bin/dump_data.sh
+++ b/bin/dump_data.sh
@@ -14,7 +14,7 @@
 # with --csv a csv dump can be created for all tables in the given components. The csv files will be generated in the temporary directory csv_dumps
 # and combined into a single TAR archive csv_dumps.
 
-set -e
+set -eou pipefail
 
 DEFAULT_APPS=(core)
 
@@ -38,6 +38,7 @@ CSV=false
 SCHEMA=true
 DATA=true
 COMBINED=false
+APPS=()
 
 for arg in "$@"; do
     case "$arg" in