diff --git a/src/main/java/com/onixbyte/helix/enumeration/ExternalHost.java b/src/main/java/com/onixbyte/helix/enumeration/ExternalHost.java
deleted file mode 100644
index af7ebd9..0000000
--- a/src/main/java/com/onixbyte/helix/enumeration/ExternalHost.java
+++ /dev/null
@@ -1,26 +0,0 @@
-package com.onixbyte.helix.enumeration;
-
-/**
- * Constants for external host configurations and endpoints.
- * <p>
- * This utility class provides centralised definitions for external service hosts, API endpoints,
- * and third-party integration points used throughout the Helix application. It serves as a single
- * source of truth for external service configurations, promoting maintainability and consistency.
- * <p>
- * The class is designed to hold static final constants representing:
- * <ul>
- *   <li>External API base URLs</li>
- *   <li>Third-party service endpoints</li>
- *   <li>Integration service hosts</li>
- *   <li>External resource locations</li>
- * </ul>
- * <p>
- * This class cannot be instantiated as it serves purely as a constant container.
- *
- * @author zihluwang
- * @since 1.0.0
- */
-public final class ExternalHost {
-
-
-}
diff --git a/src/main/java/com/onixbyte/helix/shared/AssetPrefix.java b/src/main/java/com/onixbyte/helix/shared/AssetPrefix.java
index 2591d2e..2a44c0f 100644
--- a/src/main/java/com/onixbyte/helix/shared/AssetPrefix.java
+++ b/src/main/java/com/onixbyte/helix/shared/AssetPrefix.java
@@ -1,10 +1,13 @@
 package com.onixbyte.helix.shared;
 
-public class AssetPrefix {
+public final class AssetPrefix {
 
     public static final String UPLOADS = "uploads";
 
     public static final String AVATARS = "avatars";
 
     public static final String PROFILES = "profiles";
+
+    private AssetPrefix() {
+    }
 }
diff --git a/src/main/java/com/onixbyte/helix/shared/CacheName.java b/src/main/java/com/onixbyte/helix/shared/CacheName.java
index 607d6d7..8babf0f 100644
--- a/src/main/java/com/onixbyte/helix/shared/CacheName.java
+++ b/src/main/java/com/onixbyte/helix/shared/CacheName.java
@@ -1,6 +1,6 @@
 package com.onixbyte.helix.shared;
 
-public class CacheName {
+public final class CacheName {
 
     public static final String USER = "user";
 
@@ -12,7 +12,6 @@ public class CacheName {
 
     public static final String CAPTCHA = "captcha";
 
-    public static final String CAPTCHA_SETTING = "captcha-setting";
-
-    public static final String AUTH_SETTING = "auth-setting";
+    private CacheName() {
+    }
 }
diff --git a/src/main/java/com/onixbyte/helix/shared/ExternalHost.java b/src/main/java/com/onixbyte/helix/shared/ExternalHost.java
new file mode 100644
index 0000000..5911e7b
--- /dev/null
+++ b/src/main/java/com/onixbyte/helix/shared/ExternalHost.java
@@ -0,0 +1,13 @@
+package com.onixbyte.helix.shared;
+
+/**
+ * Constants for external host configurations and endpoints.
+ *
+ * @author zihluwang
+ * @since 1.0.0
+ */
+public final class ExternalHost {
+
+    private ExternalHost() {
+    }
+}
diff --git a/src/main/java/com/onixbyte/helix/shared/SettingName.java b/src/main/java/com/onixbyte/helix/shared/SettingName.java
index 9d92b64..80ee4b3 100644
--- a/src/main/java/com/onixbyte/helix/shared/SettingName.java
+++ b/src/main/java/com/onixbyte/helix/shared/SettingName.java
@@ -1,8 +1,11 @@
 package com.onixbyte.helix.shared;
 
-public class SettingName {
+public final class SettingName {
 
     public static final String CAPTCHA_ENABLED = "captcha-enabled";
 
     public static final String REGISTER_ENABLED = "register-enabled";
+
+    private SettingName() {
+    }
 }
diff --git a/src/main/java/com/onixbyte/helix/shared/TokenConstant.java b/src/main/java/com/onixbyte/helix/shared/TokenConstant.java
index 7dbd3e8..739ad25 100644
--- a/src/main/java/com/onixbyte/helix/shared/TokenConstant.java
+++ b/src/main/java/com/onixbyte/helix/shared/TokenConstant.java
@@ -1,10 +1,13 @@
 package com.onixbyte.helix.shared;
 
-public class TokenConstant {
+public final class TokenConstant {
 
     public static final String TOKEN_HEADER_NAME = "Authorization";
 
     public static final String TOKEN_PREFIX = "Bearer ";
 
     public static final int TOKEN_PREFIX_LENGTH = TOKEN_PREFIX.length();
+
+    private TokenConstant() {
+    }
 }