diff --git a/lib/expired-date.sh b/lib/expired-date.sh
index 0878e7b..4b70b24 100644
--- a/lib/expired-date.sh
+++ b/lib/expired-date.sh
@@ -26,8 +26,8 @@ expired_date(){
     shopt -u nullglob
     if [ "${#certList[@]}" -gt "0" ]; then
         for crtFile in "${certList[@]}"; do
-            # set data from certfificate
-            cn=$(openssl x509 -noout -subject -in $crtFile | cut -d"=" -f3)
+            # set data from certfificate. xargs remove space at begin and end cn
+            cn=$(openssl x509 -noout -subject -in $crtFile | cut -d"=" -f3 | xargs)
             expiration=$(openssl x509 -noout -in $crtFile -enddate | cut -d"=" -f2)
             # convert in timestamp Unix
             exp=$(date -u -d "$expiration" +%s)