diff --git a/application/src/main/java/org/thingsboard/server/service/security/auth/jwt/settings/DefaultJwtSettingsService.java b/application/src/main/java/org/thingsboard/server/service/security/auth/jwt/settings/DefaultJwtSettingsService.java
index c877e4712d..e306dd1d2d 100644
--- a/application/src/main/java/org/thingsboard/server/service/security/auth/jwt/settings/DefaultJwtSettingsService.java
+++ b/application/src/main/java/org/thingsboard/server/service/security/auth/jwt/settings/DefaultJwtSettingsService.java
@@ -18,7 +18,6 @@ package org.thingsboard.server.service.security.auth.jwt.settings;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang3.RandomStringUtils;
-import org.jetbrains.annotations.NotNull;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Lazy;
 import org.springframework.stereotype.Service;
@@ -30,15 +29,11 @@ import org.thingsboard.server.common.data.plugin.ComponentLifecycleEvent;
 import org.thingsboard.server.common.data.security.model.JwtSettings;
 import org.thingsboard.server.dao.settings.AdminSettingsService;
 
-import javax.annotation.PostConstruct;
 import java.nio.charset.StandardCharsets;
 import java.util.Base64;
 import java.util.Objects;
 import java.util.Optional;
 
-import static org.thingsboard.server.service.security.auth.jwt.settings.JwtSettingsValidator.ADMIN_SETTINGS_JWT_KEY;
-import static org.thingsboard.server.service.security.auth.jwt.settings.JwtSettingsValidator.TOKEN_SIGNING_KEY_DEFAULT;
-
 @Service
 @RequiredArgsConstructor
 @Slf4j
@@ -49,7 +44,6 @@ public class DefaultJwtSettingsService implements JwtSettingsService {
     @Lazy
     private final Optional<TbClusterService> tbClusterService;
     private final JwtSettingsValidator jwtSettingsValidator;
-    private volatile JwtSettings jwtSettings = null; //lazy init
 
     @Value("${security.jwt.tokenExpirationTime:9000}")
     private Integer tokenExpirationTime;
@@ -60,6 +54,8 @@ public class DefaultJwtSettingsService implements JwtSettingsService {
     @Value("${security.jwt.tokenSigningKey:thingsboardDefaultSigningKey}")
     private String tokenSigningKey;
 
+    private volatile JwtSettings jwtSettings = null; //lazy init
+
     /**
      * Create JWT admin settings is intended to be called from Install scripts only
      */
@@ -160,4 +156,5 @@ public class DefaultJwtSettingsService implements JwtSettingsService {
     private boolean isSigningKeyDefault(JwtSettings settings) {
         return TOKEN_SIGNING_KEY_DEFAULT.equals(settings.getTokenSigningKey());
     }
+
 }
diff --git a/application/src/main/java/org/thingsboard/server/service/security/auth/jwt/settings/DefaultJwtSettingsValidator.java b/application/src/main/java/org/thingsboard/server/service/security/auth/jwt/settings/DefaultJwtSettingsValidator.java
index ef0e88753c..bf83179b78 100644
--- a/application/src/main/java/org/thingsboard/server/service/security/auth/jwt/settings/DefaultJwtSettingsValidator.java
+++ b/application/src/main/java/org/thingsboard/server/service/security/auth/jwt/settings/DefaultJwtSettingsValidator.java
@@ -59,7 +59,7 @@ public class DefaultJwtSettingsValidator implements JwtSettingsValidator {
         if (Arrays.isNullOrEmpty(decodedKey)) {
             throw new DataValidationException("JWT token signing key should be non-empty after Base64 decoding!");
         }
-        if (decodedKey.length * Byte.SIZE < 256 && !TOKEN_SIGNING_KEY_DEFAULT.equals(jwtSettings.getTokenSigningKey())) {
+        if (decodedKey.length * Byte.SIZE < 256 && !JwtSettingsService.TOKEN_SIGNING_KEY_DEFAULT.equals(jwtSettings.getTokenSigningKey())) {
             throw new DataValidationException("JWT token signing key should be a Base64 encoded string representing at least 256 bits of data!");
         }
 
diff --git a/application/src/main/java/org/thingsboard/server/service/security/auth/jwt/settings/InstallJwtSettingsValidator.java b/application/src/main/java/org/thingsboard/server/service/security/auth/jwt/settings/InstallJwtSettingsValidator.java
index b8667c45a8..6202e60c96 100644
--- a/application/src/main/java/org/thingsboard/server/service/security/auth/jwt/settings/InstallJwtSettingsValidator.java
+++ b/application/src/main/java/org/thingsboard/server/service/security/auth/jwt/settings/InstallJwtSettingsValidator.java
@@ -21,15 +21,16 @@ import org.springframework.context.annotation.Profile;
 import org.springframework.stereotype.Component;
 import org.thingsboard.server.common.data.security.model.JwtSettings;
 
+/**
+ * During Install or upgrade the validation is suppressed to keep existing data
+ * */
+
 @Primary
 @Profile("install")
 @Component
 @RequiredArgsConstructor
 public class InstallJwtSettingsValidator implements JwtSettingsValidator {
 
-    /**
-     * During Install or upgrade the validation is suppressed to keep existing data
-     * */
     @Override
     public void validate(JwtSettings jwtSettings) {
 
diff --git a/application/src/main/java/org/thingsboard/server/service/security/auth/jwt/settings/JwtSettingsService.java b/application/src/main/java/org/thingsboard/server/service/security/auth/jwt/settings/JwtSettingsService.java
index b5fe1bbf9f..bf02be573c 100644
--- a/application/src/main/java/org/thingsboard/server/service/security/auth/jwt/settings/JwtSettingsService.java
+++ b/application/src/main/java/org/thingsboard/server/service/security/auth/jwt/settings/JwtSettingsService.java
@@ -19,6 +19,9 @@ import org.thingsboard.server.common.data.security.model.JwtSettings;
 
 public interface JwtSettingsService {
 
+    String ADMIN_SETTINGS_JWT_KEY = "jwt";
+    String TOKEN_SIGNING_KEY_DEFAULT = "thingsboardDefaultSigningKey";
+
     JwtSettings getJwtSettings();
 
     JwtSettings reloadJwtSettings();
diff --git a/application/src/main/java/org/thingsboard/server/service/security/auth/jwt/settings/JwtSettingsValidator.java b/application/src/main/java/org/thingsboard/server/service/security/auth/jwt/settings/JwtSettingsValidator.java
index 30d23bca00..06a82fc808 100644
--- a/application/src/main/java/org/thingsboard/server/service/security/auth/jwt/settings/JwtSettingsValidator.java
+++ b/application/src/main/java/org/thingsboard/server/service/security/auth/jwt/settings/JwtSettingsValidator.java
@@ -18,8 +18,6 @@ package org.thingsboard.server.service.security.auth.jwt.settings;
 import org.thingsboard.server.common.data.security.model.JwtSettings;
 
 public interface JwtSettingsValidator {
-    String ADMIN_SETTINGS_JWT_KEY = "jwt";
-    String TOKEN_SIGNING_KEY_DEFAULT = "thingsboardDefaultSigningKey";
 
     void validate(JwtSettings jwtSettings);
 }