diff --git a/backend/src/main/java/com/openisle/config/SecurityConfig.java b/backend/src/main/java/com/openisle/config/SecurityConfig.java
index 0f8f1bf75..852ea1c5c 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("${app.website-url}")
+    @Value("${app.website-url:https://www.open-isle.com}")
     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 1ff623ab3..91b44ff89 100644
--- a/backend/src/main/java/com/openisle/controller/AdminUserController.java
+++ b/backend/src/main/java/com/openisle/controller/AdminUserController.java
@@ -14,7 +14,7 @@ import org.springframework.web.bind.annotation.*;
 public class AdminUserController {
     private final UserRepository userRepository;
     private final EmailSender emailSender;
-    @Value("${app.website-url}")
+    @Value("${app.website-url:https://www.open-isle.com}")
     private String websiteUrl;
 
     @PostMapping("/{id}/approve")
diff --git a/backend/src/main/java/com/openisle/service/NotificationService.java b/backend/src/main/java/com/openisle/service/NotificationService.java
index 95264e6eb..9ad4d9cdd 100644
--- a/backend/src/main/java/com/openisle/service/NotificationService.java
+++ b/backend/src/main/java/com/openisle/service/NotificationService.java
@@ -32,7 +32,7 @@ public class NotificationService {
     private final ReactionRepository reactionRepository;
     private final Executor notificationExecutor;
 
-    @Value("${app.website-url}")
+    @Value("${app.website-url:https://www.open-isle.com}")
     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 37d62ef4d..9e162bd03 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("${app.website-url}")
+    @Value("${app.website-url:https://www.open-isle.com}")
     private String websiteUrl;
 
     @Transactional