diff --git a/how-to-create-encrypted-paper-backup/secure-erase.sh b/how-to-create-encrypted-paper-backup/secure-erase.sh
index abf03fd..6d4e40a 100755
--- a/how-to-create-encrypted-paper-backup/secure-erase.sh
+++ b/how-to-create-encrypted-paper-backup/secure-erase.sh
@@ -1,5 +1,8 @@
 #! /bin/bash
 
+set -e
+set -o pipefail
+
 rounds=3
 
 positional=()
@@ -58,11 +61,11 @@ read -r answer
 if [ "$answer" = "y" ]; then
   for round in $(seq 1 1 $rounds); do
     printf "%s\n" "Overwriting with random data… (round $round of $rounds)"
-    sudo dd bs=1M if=/dev/urandom of=$dev
+    sudo dd bs=1M if=/dev/urandom of=$dev || true
   done
   if [ $zero = true ]; then
     printf "%s\n" "Overwriting with zeros…"
-    sudo dd bs=1M if=/dev/zero of=$dev
+    sudo dd bs=1M if=/dev/zero of=$dev || true
   fi
 else
   exit 0
diff --git a/how-to-create-encrypted-paper-backup/secure-erase.sh.sig b/how-to-create-encrypted-paper-backup/secure-erase.sh.sig
index 2eff4ae..f92a6e5 100644
--- a/how-to-create-encrypted-paper-backup/secure-erase.sh.sig
+++ b/how-to-create-encrypted-paper-backup/secure-erase.sh.sig
@@ -1,16 +1,16 @@
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