diff --git a/check-versions.sh b/check-versions.sh
index 119eb76..8a6b3ec 100644
--- a/check-versions.sh
+++ b/check-versions.sh
@@ -6,6 +6,9 @@
 # Checks that the version numbers in the index file match those in the
 # modpacks.
 
+set -e
+set -x
+
 IFS='|'
 jq -r '.modpacks[] | "\(.name)|\(.version)|\(.url)"' index.json \
 	| while read NAME VERSION URL; do