diff --git a/backend/src/main/java/com/openisle/config/SecurityConfig.java b/backend/src/main/java/com/openisle/config/SecurityConfig.java
index 55cfaf547..7701d3df7 100644
--- a/backend/src/main/java/com/openisle/config/SecurityConfig.java
+++ b/backend/src/main/java/com/openisle/config/SecurityConfig.java
@@ -41,7 +41,7 @@ public class SecurityConfig {
     private final UserRepository userRepository;
     private final AccessDeniedHandler customAccessDeniedHandler;
     private final UserVisitService userVisitService;
-    @Value("${app.website-url:https://www.open-isle.com}")
+    @Value("${app.website-url}")
     private String websiteUrl;
 
     @Bean
diff --git a/backend/src/main/java/com/openisle/controller/AdminUserController.java b/backend/src/main/java/com/openisle/controller/AdminUserController.java
index 2e43e6188..4beed5ce5 100644
--- a/backend/src/main/java/com/openisle/controller/AdminUserController.java
+++ b/backend/src/main/java/com/openisle/controller/AdminUserController.java
@@ -18,7 +18,7 @@ public class AdminUserController {
     private final UserRepository userRepository;
     private final NotificationRepository notificationRepository;
     private final EmailSender emailSender;
-    @Value("${app.website-url:https://www.open-isle.com}")
+    @Value("${app.website-url}")
     private String websiteUrl;
 
     @PostMapping("/{id}/approve")
diff --git a/backend/src/main/java/com/openisle/controller/SitemapController.java b/backend/src/main/java/com/openisle/controller/SitemapController.java
index 4b8b0818c..e7e03f40a 100644
--- a/backend/src/main/java/com/openisle/controller/SitemapController.java
+++ b/backend/src/main/java/com/openisle/controller/SitemapController.java
@@ -22,7 +22,7 @@ import java.util.List;
 public class SitemapController {
     private final PostRepository postRepository;
 
-    @Value("${app.website-url:https://www.open-isle.com}")
+    @Value("${app.website-url}")
     private String websiteUrl;
 
     @GetMapping(value = "/sitemap.xml", produces = MediaType.APPLICATION_XML_VALUE)
diff --git a/backend/src/main/java/com/openisle/service/NotificationService.java b/backend/src/main/java/com/openisle/service/NotificationService.java
index aabdb5b03..b459456b7 100644
--- a/backend/src/main/java/com/openisle/service/NotificationService.java
+++ b/backend/src/main/java/com/openisle/service/NotificationService.java
@@ -36,7 +36,7 @@ public class NotificationService {
     private final ReactionRepository reactionRepository;
     private final Executor notificationExecutor;
 
-    @Value("${app.website-url:https://www.open-isle.com}")
+    @Value("${app.website-url}")
     private String websiteUrl;
 
     private static final Pattern MENTION_PATTERN = Pattern.compile("@\\[([^\\]]+)\\]");
diff --git a/backend/src/main/java/com/openisle/service/ReactionService.java b/backend/src/main/java/com/openisle/service/ReactionService.java
index ae336bad9..b6cda46f5 100644
--- a/backend/src/main/java/com/openisle/service/ReactionService.java
+++ b/backend/src/main/java/com/openisle/service/ReactionService.java
@@ -27,7 +27,7 @@ public class ReactionService {
     private final NotificationService notificationService;
     private final EmailSender emailSender;
 
-    @Value("${app.website-url:https://www.open-isle.com}")
+    @Value("${app.website-url}")
     private String websiteUrl;
 
     @Transactional