diff --git a/how-to-backup-and-encrypt-data-using-rsync-and-veracrypt-on-macos/README.md b/how-to-backup-and-encrypt-data-using-rsync-and-veracrypt-on-macos/README.md
index 96a3ac9..89e9bca 100644
--- a/how-to-backup-and-encrypt-data-using-rsync-and-veracrypt-on-macos/README.md
+++ b/how-to-backup-and-encrypt-data-using-rsync-and-veracrypt-on-macos/README.md
@@ -265,6 +265,7 @@ cat << EOF > /usr/local/bin/backup.sh
 #! /bin/sh
 
 set -e
+set -o pipefail
 
 function dismount()
 {
@@ -343,6 +344,7 @@ cat << EOF > /usr/local/bin/check.sh
 #! /bin/sh
 
 set -e
+set -o pipefail
 
 red=\$(tput setaf 1)
 normal=\$(tput sgr0)
diff --git a/how-to-spoof-mac-address-and-hostname-automatically-at-boot-on-macos/README.md b/how-to-spoof-mac-address-and-hostname-automatically-at-boot-on-macos/README.md
index 4a012d3..8a41e10 100644
--- a/how-to-spoof-mac-address-and-hostname-automatically-at-boot-on-macos/README.md
+++ b/how-to-spoof-mac-address-and-hostname-automatically-at-boot-on-macos/README.md
@@ -59,6 +59,7 @@ cat << "EOF" > /usr/local/sbin/spoof.sh
 #! /bin/sh
 
 set -e
+set -o pipefail
 
 export LC_CTYPE=C