diff --git a/script/release b/script/release
index dd01be6297..6bf326f5ac 100755
--- a/script/release
+++ b/script/release
@@ -1,6 +1,10 @@
 #!/bin/sh
 # Pushes a new version to PyPi.
 
+# Stop on errors
+set -e
+
 cd "$(dirname "$0")/.."
 
+script/build_frontend
 python3 setup.py sdist upload