diff --git a/make-aws-cloudfront-range.sh b/make-aws-cloudfront-range.sh
index 6d89731..6b388e1 100755
--- a/make-aws-cloudfront-range.sh
+++ b/make-aws-cloudfront-range.sh
@@ -1,5 +1,7 @@
 #!/bin/sh
 
+set -eu
+
 # See: https://stackoverflow.com/a/69768584/5155484
 curl -f -s -# https://ip-ranges.amazonaws.com/ip-ranges.json | jq -r '.prefixes[] | select(.service == "CLOUDFRONT") | .ip_prefix' | sort -V > cloudfront-ips.txt
 curl -f -s -# https://ip-ranges.amazonaws.com/ip-ranges.json | jq -r '.ipv6_prefixes[] | select(.service == "CLOUDFRONT") | .ipv6_prefix' | sort -V >> cloudfront-ips.txt
diff --git a/make-binaryedge.sh b/make-binaryedge.sh
index def7f18..17c9341 100755
--- a/make-binaryedge.sh
+++ b/make-binaryedge.sh
@@ -1,5 +1,7 @@
 #!/bin/sh
 
+set -eu
+
 REV="v-$(date --iso-8601=seconds)"
 
 cd ./digitalocean/
diff --git a/make-stretchoid.sh b/make-stretchoid.sh
index 56afe68..1697c30 100755
--- a/make-stretchoid.sh
+++ b/make-stretchoid.sh
@@ -1,5 +1,7 @@
 #!/bin/sh
 
+set -eu
+
 REV="v-$(date --iso-8601=seconds)"
 
 cd ./digitalocean/