diff --git a/.gitignore b/.gitignore
index b182160..93c3af2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,5 @@
-# Created by https://www.toptal.com/developers/gitignore/api/python,visualstudiocode
-# Edit at https://www.toptal.com/developers/gitignore?templates=python,visualstudiocode
+# Created by https://www.toptal.com/developers/gitignore/api/python,visualstudiocode,sonarqube
+# Edit at https://www.toptal.com/developers/gitignore?templates=python,visualstudiocode,sonarqube
 
 ### Python ###
 # Byte-compiled / optimized / DLL files
@@ -173,6 +173,19 @@ poetry.toml
 # LSP config files
 pyrightconfig.json
 
+### SonarQube ###
+# SonarQube ignore files.
+#
+# https://docs.sonarqube.org/display/SCAN/Analyzing+with+SonarQube+Scanner
+# Sonar Scanner working directories
+.sonar/
+.sonarqube/
+.scannerwork/
+
+# http://www.sonarlint.org/commandline/
+# SonarLint working directories, configuration files (including credentials)
+.sonarlint/
+
 ### VisualStudioCode ###
 .vscode/
 
@@ -187,4 +200,4 @@ pyrightconfig.json
 .history
 .ionide
 
-# End of https://www.toptal.com/developers/gitignore/api/python,visualstudiocode
\ No newline at end of file
+# End of https://www.toptal.com/developers/gitignore/api/python,visualstudiocode,sonarqube
\ No newline at end of file
diff --git a/README.md b/README.md
index 57cf094..50bb65f 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,9 @@
 
 This project aims to implement a Dynamic DNS (DDNS) solution using Cloudflare's API. 
 
-[![Maintainability Rating](https://sonar.pieroot.xyz/api/project_badges/measure?project=pieroot_cloudflare-ddns_e6da100b-a671-4736-87ac-9a41acda99f6&metric=sqale_rating&token=sqb_f7f644f779ab4e442b5d5e431589f57bd3c64150)](https://sonar.pieroot.xyz/dashboard?id=pieroot_cloudflare-ddns_e6da100b-a671-4736-87ac-9a41acda99f6)
+[![Quality Gate Status](https://sonar.pieroot.xyz/api/project_badges/measure?project=jung-geun_cloudflare-ddns_AZIjf9NeRMPvGKjJzls4&metric=alert_status&token=sqb_706e3b82fdb379ee29accac27f1bd19726dcb31c)](https://sonar.pieroot.xyz/dashboard?id=jung-geun_cloudflare-ddns_AZIjf9NeRMPvGKjJzls4)
+[![Security Hotspots](https://sonar.pieroot.xyz/api/project_badges/measure?project=jung-geun_cloudflare-ddns_AZIjf9NeRMPvGKjJzls4&metric=security_hotspots&token=sqb_706e3b82fdb379ee29accac27f1bd19726dcb31c)](https://sonar.pieroot.xyz/dashboard?id=jung-geun_cloudflare-ddns_AZIjf9NeRMPvGKjJzls4)
+[![Bugs](https://sonar.pieroot.xyz/api/project_badges/measure?project=jung-geun_cloudflare-ddns_AZIjf9NeRMPvGKjJzls4&metric=bugs&token=sqb_706e3b82fdb379ee29accac27f1bd19726dcb31c)](https://sonar.pieroot.xyz/dashboard?id=jung-geun_cloudflare-ddns_AZIjf9NeRMPvGKjJzls4)
 
 ## Overview
 Dynamic DNS allows you to associate a domain name with a changing IP address, making it easier to access your network resources remotely. Cloudflare's API provides the necessary tools to automate this process.
diff --git a/src/update_dns.py b/src/update_dns.py
index 11ffb5b..4fed954 100644
--- a/src/update_dns.py
+++ b/src/update_dns.py
@@ -22,6 +22,8 @@ logger.addHandler(fileHandler)
 logger.addHandler(logging.StreamHandler())
 
 DEFAULT_CONFIG_PATH = os.path.join(os.path.dirname(__file__), "../config/env.json")
+PWD = os.path.dirname(os.path.abspath(__file__))
+TMP_PATH = os.path.join(PWD, "tmp")
 
 
 class DDNS:
@@ -34,6 +36,7 @@ class DDNS:
         logger.info(f"Previous IP: {previous_ip}")
         self.current_ip = current_ip
         self.cname_list = self.config["CLOUDFLARE_CNAME"]
+        self.external_ip_path = os.path.join(TMP_PATH, "external_ip.txt")
 
         self.HEADERS = {
             "Content-Type": "application/json",
@@ -105,11 +108,11 @@ class DDNS:
 
     def previous_ip(self):
         try:
-            if os.path.exists("/tmp/external_ip.txt"):
-                with open("/tmp/external_ip.txt", "r") as file:
+            if os.path.exists(self.external_ip_path):
+                with open(self.external_ip_path, "r") as file:
                     return file.read()
             else:
-                os.mknod("/tmp/external_ip.txt")
+                os.mknod(self.external_ip_path)
         except Exception as e:
             logger.error(f"Error: {e}")
             return None
@@ -127,7 +130,7 @@ class DDNS:
 
     def update_ip(self, ip):
         try:
-            with open("/tmp/external_ip.txt", "w") as file:
+            with open(self.external_ip_path, "w") as file:
                 file.write(ip)
             logger.info("IP is updated")
         except Exception as e:
diff --git a/tmp/.gitkeep b/tmp/.gitkeep
new file mode 100644
index 0000000..e69de29