diff --git a/src/main/java/io/spring/api/CurrentUserApi.java b/src/main/java/io/spring/api/CurrentUserApi.java
index dfa5e6e..5444dc8 100644
--- a/src/main/java/io/spring/api/CurrentUserApi.java
+++ b/src/main/java/io/spring/api/CurrentUserApi.java
@@ -16,7 +16,6 @@ import org.springframework.web.bind.annotation.PutMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestHeader;
 import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.web.bind.annotation.RestController;
 
 import javax.validation.Valid;
diff --git a/src/main/java/io/spring/api/exception/ErrorResource.java b/src/main/java/io/spring/api/exception/ErrorResource.java
index 84c8256..7ef1ab4 100644
--- a/src/main/java/io/spring/api/exception/ErrorResource.java
+++ b/src/main/java/io/spring/api/exception/ErrorResource.java
@@ -4,10 +4,7 @@ import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonRootName;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 
-import java.util.ArrayList;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 
 @JsonSerialize(using = ErrorResourceSerializer.class)
 @JsonIgnoreProperties(ignoreUnknown = true)
diff --git a/src/main/java/io/spring/api/exception/InvalidRequestException.java b/src/main/java/io/spring/api/exception/InvalidRequestException.java
index a2747c4..fd2c55f 100644
--- a/src/main/java/io/spring/api/exception/InvalidRequestException.java
+++ b/src/main/java/io/spring/api/exception/InvalidRequestException.java
@@ -1,7 +1,6 @@
 package io.spring.api.exception;
 
 import com.fasterxml.jackson.annotation.JsonRootName;
-import org.springframework.validation.BindingResult;
 import org.springframework.validation.Errors;
 
 @SuppressWarnings("serial")
diff --git a/src/main/java/io/spring/api/security/JwtTokenFilter.java b/src/main/java/io/spring/api/security/JwtTokenFilter.java
index 335df3d..e29b5fd 100644
--- a/src/main/java/io/spring/api/security/JwtTokenFilter.java
+++ b/src/main/java/io/spring/api/security/JwtTokenFilter.java
@@ -3,8 +3,6 @@ package io.spring.api.security;
 import io.spring.application.JwtService;
 import io.spring.core.user.User;
 import io.spring.core.user.UserRepository;
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
 import org.springframework.security.core.context.SecurityContextHolder;
diff --git a/src/main/java/io/spring/application/user/UserData.java b/src/main/java/io/spring/application/user/UserData.java
index 04db5c8..40e1a5e 100644
--- a/src/main/java/io/spring/application/user/UserData.java
+++ b/src/main/java/io/spring/application/user/UserData.java
@@ -5,8 +5,6 @@ import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.NoArgsConstructor;
 
-import javax.persistence.Entity;
-import javax.persistence.Id;
 
 @Data
 @NoArgsConstructor
diff --git a/src/main/java/io/spring/core/user/User.java b/src/main/java/io/spring/core/user/User.java
index 3060068..bb41f43 100644
--- a/src/main/java/io/spring/core/user/User.java
+++ b/src/main/java/io/spring/core/user/User.java
@@ -1,6 +1,5 @@
 package io.spring.core.user;
 
-import lombok.AllArgsConstructor;
 import lombok.EqualsAndHashCode;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
diff --git a/src/main/java/io/spring/infrastructure/service/DefaultJwtService.java b/src/main/java/io/spring/infrastructure/service/DefaultJwtService.java
index 1e6112b..add8cbd 100644
--- a/src/main/java/io/spring/infrastructure/service/DefaultJwtService.java
+++ b/src/main/java/io/spring/infrastructure/service/DefaultJwtService.java
@@ -4,13 +4,11 @@ import io.jsonwebtoken.Claims;
 import io.jsonwebtoken.Jws;
 import io.jsonwebtoken.Jwts;
 import io.jsonwebtoken.SignatureAlgorithm;
-import io.jsonwebtoken.SignatureException;
 import io.spring.application.JwtService;
 import io.spring.application.user.UserData;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Component;
-import org.springframework.stereotype.Service;
 
 import java.util.Date;
 import java.util.Optional;
diff --git a/src/test/java/io/spring/api/CurrentUserApiTest.java b/src/test/java/io/spring/api/CurrentUserApiTest.java
index 66f1d2c..6d94399 100644
--- a/src/test/java/io/spring/api/CurrentUserApiTest.java
+++ b/src/test/java/io/spring/api/CurrentUserApiTest.java
@@ -1,15 +1,9 @@
 package io.spring.api;
 
 import io.restassured.RestAssured;
-import io.spring.application.JwtService;
-import io.spring.application.user.UserData;
-import io.spring.application.user.UserReadService;
-import io.spring.core.user.User;
-import io.spring.core.user.UserRepository;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
-import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.context.embedded.LocalServerPort;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.test.context.junit4.SpringRunner;
diff --git a/src/test/java/io/spring/application/article/ArticleQueryServiceTest.java b/src/test/java/io/spring/application/article/ArticleQueryServiceTest.java
index 5181299..5b51079 100644
--- a/src/test/java/io/spring/application/article/ArticleQueryServiceTest.java
+++ b/src/test/java/io/spring/application/article/ArticleQueryServiceTest.java
@@ -10,7 +10,6 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mybatis.spring.boot.test.autoconfigure.MybatisTest;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.context.annotation.Import;
 import org.springframework.test.context.junit4.SpringRunner;