diff --git a/keepalived/files/keepalived.conf b/keepalived/files/keepalived.conf
index cdff79c..e70334b 100644
--- a/keepalived/files/keepalived.conf
+++ b/keepalived/files/keepalived.conf
@@ -7,7 +7,7 @@
 {%- if script.name is defined %}
 {%- set name=script.name %}
 {%- endif %}
-  script "/usr/local/bin/vrrp_script_{{ name }}.sh '{{ "' '".join(script.get('args', [])|sequence) }}'"
+  script "/usr/local/bin/vrrp_script_{{ name }}.sh '{{ "' '".join(script.get('args', [])|sequence|map('string')) }}'"
   interval {{ script.get('interval', 2) }} # check every Ns
   fall {{ script.get('fall', 2) }}   # require N failures for KO
   rise {{ script.get('rise', 2) }}   # require N successes for OK
diff --git a/keepalived/files/vrrp_script_check_port.sh b/keepalived/files/vrrp_script_check_port.sh
old mode 100755
new mode 100644
index ee610ad..6bdd34b
--- a/keepalived/files/vrrp_script_check_port.sh
+++ b/keepalived/files/vrrp_script_check_port.sh
@@ -2,4 +2,4 @@
 # $1 PORT
 # $2 [TCP|UDP]
 # $3 inet family [4|6]
-lsof -i${3}${2}:${1} | grep 'LISTEN'
+lsof -i${3}${2}:${1} | grep -Fq LISTEN