diff --git a/deploy.sh b/deploy.sh
index 54088fd..fe812f3 100644
--- a/deploy.sh
+++ b/deploy.sh
@@ -928,15 +928,18 @@ postrun_action() {
       ssh_to_host 'bash -s' << EOF
 echo "Enrolling boot disk key to TPM..."
 
+BOOT_DISKS_ID=(${BOOT_DISKS_ID[@]})
+DISK_PATH=""
 j=1
-for i in ${!BOOT_DISKS_ID[@]}; do
-  if [[ echo "${BOOT_DISKS_ID[${i}]}" | grep -iq "nvme" ]]; then
-    DISK_PATH="/dev/${BOOT_DISKS_ID[${i}]}p2"
+
+for i in \${!BOOT_DISKS_ID[@]}; do
+  if [[ echo "\${BOOT_DISKS_ID[\${i}]}" | grep -iq "nvme" ]]; then
+    DISK_PATH="/dev/\${BOOT_DISKS_ID[\${i}]}p2"
   else
-    DISK_PATH="/dev/${BOOT_DISKS_ID[${i}]}2"
+    DISK_PATH="/dev/\${BOOT_DISKS_ID[\${i}]}2"
   fi
-  echo ${REMOTE_PASS} | sudo -S systemd-cryptenroll --tpm2-device=auto --tpm2-pcrs=0+7 --unlock-key-file=/etc/secrets/disks/boot-${j} ${DISK_PATH}
-  ((j++))
+  echo ${REMOTE_PASS} | sudo -S systemd-cryptenroll --tpm2-device=auto --tpm2-pcrs=0+7 --unlock-key-file=/etc/secrets/disks/boot-\${j} \${DISK_PATH}
+  j=\$((j + 1))
 done
 
 echo "Getting PCRS 15 hash..."