diff --git a/zypper.py b/zypper.py
index 69f13c7..77b5126 100755
--- a/zypper.py
+++ b/zypper.py
@@ -113,8 +113,8 @@ def print_reboot_required():
             stderr=subprocess.DEVNULL,
             check=False)
 
-        print('# HELP node_reboot_required Node require reboot to activate installed updates or '\
-            'patches. (0 = not needed, 1 = needed)')
+        print('# HELP node_reboot_required Node require reboot to activate installed updates or '
+              'patches. (0 = not needed, 1 = needed)')
         print('# TYPE node_reboot_required gauge')
         if result.returncode == 0:
             print('node_reboot_required 0')
@@ -228,7 +228,7 @@ def main(argv: Sequence[str] | None = None) -> int:
     ).stdout.decode('utf-8')
     data_zypper_orphaned = __extract_orphaned_data(raw_zypper_orphaned)
 
-    print('# HELP zypper_update_pending zypper package update available from repository. (0 = not '\
+    print('# HELP zypper_update_pending zypper package update available from repository. (0 = not '
           'available, 1 = available)')
     print('# TYPE zypper_update_pending gauge')
     print_pending_updates(data_zypper_lu, args.all_info)
@@ -237,7 +237,7 @@ def main(argv: Sequence[str] | None = None) -> int:
     print('# TYPE zypper_updates_pending_total counter')
     print_updates_sum(data_zypper_lu)
 
-    print('# HELP zypper_patch_pending zypper patch available from repository. (0 = not available '\
+    print('# HELP zypper_patch_pending zypper patch available from repository. (0 = not available '
           ', 1 = available)')
     print('# TYPE zypper_patch_pending gauge')
     print_pending_patches(data_zypper_lp, args.all_info)
@@ -246,21 +246,21 @@ def main(argv: Sequence[str] | None = None) -> int:
     print('# TYPE zypper_patches_pending_total counter')
     print_patches_sum(data_zypper_lp)
 
-    print('# HELP zypper_patches_pending_security_total zypper patches available with category '\
+    print('# HELP zypper_patches_pending_security_total zypper patches available with category '
           'security total')
     print('# TYPE zypper_patches_pending_security_total counter')
     print_patches_sum(data_zypper_lp,
                       prefix="zypper_patches_pending_security_total",
                       filters={'Category': 'security'})
 
-    print('# HELP zypper_patches_pending_security_important_total zypper patches available with '\
+    print('# HELP zypper_patches_pending_security_important_total zypper patches available with '
           'category security severity important total')
     print('# TYPE zypper_patches_pending_security_important_total counter')
     print_patches_sum(data_zypper_lp,
                       prefix="zypper_patches_pending_security_important_total",
                       filters={'Category': 'security', 'Severity': 'important'})
 
-    print('# HELP zypper_patches_pending_reboot_total zypper patches available which require '\
+    print('# HELP zypper_patches_pending_reboot_total zypper patches available which require '
           'reboot total')
     print('# TYPE zypper_patches_pending_reboot_total counter')
     print_patches_sum(data_zypper_lp,
diff --git a/zypper.sh b/zypper.sh
index 624ac68..073f2f8 100755
--- a/zypper.sh
+++ b/zypper.sh
@@ -10,7 +10,8 @@ set -o nounset # fail if unset variables
 set -o pipefail # reflect exit status
 
 if [[ "${1-}" =~ ^-*h(elp)?$ ]]; then
-  echo """Usage: zypper.sh [OPTION]
+  # shellcheck disable=SC1078
+  echo "Usage: zypper.sh [OPTION]
 This is an script to extract monitoring values for the zypper package
 
 It work only with root permission!
@@ -21,9 +22,9 @@ Available options:
 
 Examples:
  zypper.sh --less
- zypper.sh -m
-"""
-  exit
+ zypper.sh -m"
+  # shellcheck enable=SC1078
+  exit 0
 fi
 
 # Check if we are root
@@ -32,6 +33,7 @@ if [ "$EUID" -ne 0 ]; then
   exit 1
 fi
 
+# shellcheck disable=SC2016
 filter_pending_updates='
 BEGIN {
     FS=" \\| ";  # set field separator to " | "
@@ -104,10 +106,11 @@ NR {
     printf "zypper_package_orphan{package=\"%s\",installed-version=\"%s\"} 1\n", package, installed_version
 }
 '
+# shellcheck enable=SC2016
 
 get_pending_updates() {
   if [ -z "$1" ]; then 
-    echo 'zypper_update_pending{repository="",package-name="",available-version=""} 0'
+    echo "zypper_update_pending{repository=\"\",package-name=\"\",available-version=\"\"} 0"
   else
     echo "$1" |
       awk -v output_format=$2 "$filter_pending_updates" 
@@ -128,7 +131,7 @@ get_updates_sum() {
 
 get_pending_patches() {
   if [ -z "$1" ]; then 
-    echo 'zypper_patch_pending{repository="",patch-name="",category="",severity="",interactive="",status=""} 0'
+    echo "zypper_patch_pending{repository=\"\",patch-name=\"\",category=\"\",severity=\"\",interactive=\"\",status=\"\"} 0"
   else
     echo "$1" |
       awk -v output_format=$2 "$filter_pending_patches"
@@ -141,8 +144,7 @@ get_pending_security_patches() {
       echo "0"
     else
       echo "$1" | 
-        grep "| security" |
-        wc -l
+        grep -c "| security"
     fi
   } |
   awk '{print "zypper_patches_pending_security_total "$1}'
@@ -154,9 +156,7 @@ get_pending_security_important_patches() {
       echo "0"
     else
       echo "$1" | 
-        grep "| security" |
-        grep important |
-        wc -l
+        grep -c "| security.*important"
     fi
   } |
   awk '{print "zypper_patches_pending_security_important_total "$1}'
@@ -168,8 +168,7 @@ get_pending_reboot_patches() {
       echo "0"
     else
       echo "$1" | 
-        grep reboot | 
-        wc -l 
+        grep -c "reboot"
     fi
   } |
   awk '{print "zypper_patches_pending_reboot_total "$1}'
@@ -194,7 +193,7 @@ get_zypper_version() {
 
 get_orphan_packages() {
   if [ -z "$1" ]; then 
-    echo 'zypper_package_orphan{package="",installed-version=""} 0'
+    echo "zypper_package_orphan{package=\"\",installed-version=\"\"} 0"
   else
     echo "$1" |
       awk "$filter_orphan_packages"