diff --git a/mender-convert-extract b/mender-convert-extract
index e611677..1f700a3 100755
--- a/mender-convert-extract
+++ b/mender-convert-extract
@@ -1,6 +1,6 @@
 #! /usr/bin/env bash
 #
-# Copyright 2019 Northern.tech AS
+# Copyright 2020 Northern.tech AS
 #
 #  Licensed under the Apache License, Version 2.0 (the "License");
 #  you may not use this file except in compliance with the License.
@@ -26,7 +26,7 @@ disk_image=""
 while (( "$#" )); do
   case "$1" in
     -o | --overlay)
-      overlays+="${2}"
+      overlays+=("${2}")
       shift 2
       ;;
     -c | --config)
diff --git a/mender-convert-modify b/mender-convert-modify
index 36d36d1..16d4a6c 100755
--- a/mender-convert-modify
+++ b/mender-convert-modify
@@ -1,6 +1,6 @@
 #! /usr/bin/env bash
 #
-# Copyright 2019 Northern.tech AS
+# Copyright 2020 Northern.tech AS
 #
 #  Licensed under the Apache License, Version 2.0 (the "License");
 #  you may not use this file except in compliance with the License.
@@ -49,7 +49,7 @@ declare -a configs=("configs/mender_convert_config")
 while (( "$#" )); do
   case "$1" in
     -o | --overlay)
-      overlays+="${2}"
+      overlays+=("${2}")
       shift 2
       ;;
     -c | --config)
diff --git a/mender-convert-package b/mender-convert-package
index 5649492..7b870f8 100755
--- a/mender-convert-package
+++ b/mender-convert-package
@@ -1,6 +1,6 @@
 #! /usr/bin/env bash
 #
-# Copyright 2019 Northern.tech AS
+# Copyright 2020 Northern.tech AS
 #
 #  Licensed under the Apache License, Version 2.0 (the "License");
 #  you may not use this file except in compliance with the License.
@@ -44,7 +44,7 @@ declare -a configs=("configs/mender_convert_config")
 while (( "$#" )); do
   case "$1" in
     -o | --overlay)
-      overlays+="${2}"
+      overlays+=("${2}")
       shift 2
       ;;
     -c | --config)