diff --git a/build.gradle b/build.gradle
index dbed9f5..ff5c6cb 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,6 +1,6 @@
 buildscript {
 	ext {
-		springBootVersion = '1.5.6.RELEASE'
+		springBootVersion = '2.0.2.RELEASE'
 	}
 	repositories {
 		mavenCentral()
@@ -14,6 +14,14 @@ apply plugin: 'java'
 apply plugin: 'eclipse'
 apply plugin: 'idea'
 apply plugin: 'org.springframework.boot'
+apply plugin: 'io.spring.dependency-management'
+
+dependencyManagement {
+    imports {
+        mavenBom org.springframework.boot.gradle.plugin.SpringBootPlugin.BOM_COORDINATES
+    }
+    applyMavenExclusions = false
+}
 
 version = '0.0.1-SNAPSHOT'
 sourceCompatibility = 1.8
@@ -33,17 +41,17 @@ dependencies {
 	compile('org.springframework.boot:spring-boot-starter-data-jpa')
 	compile('org.flywaydb:flyway-core')
 	compile('org.springframework.boot:spring-boot-starter-hateoas')
-	compile('org.mybatis.spring.boot:mybatis-spring-boot-starter:1.3.0')
+	compile('org.mybatis.spring.boot:mybatis-spring-boot-starter:1.3.2')
 	compile('org.springframework.boot:spring-boot-starter-web')
-	compile('io.jsonwebtoken:jjwt:0.7.0')
+	compile('io.jsonwebtoken:jjwt:0.9.0')
     compile('org.springframework.boot:spring-boot-starter-security')
 	compile('joda-time:joda-time:2.9.9')
     compileOnly('org.projectlombok:lombok')
 	runtime('com.h2database:h2')
-    testCompile 'io.rest-assured:rest-assured:3.0.2'
-	testCompile 'io.rest-assured:spring-mock-mvc:3.0.2'
-	testCompile 'org.springframework.security:spring-security-test:4.0.4.RELEASE'
+    testCompile 'io.rest-assured:rest-assured:3.1.0'
+	testCompile 'io.rest-assured:spring-mock-mvc:3.1.0'
+	testCompile 'org.springframework.security:spring-security-test'
 	testCompile('org.springframework.boot:spring-boot-starter-test')
 	testCompile('org.springframework.restdocs:spring-restdocs-mockmvc')
-    testCompile('org.mybatis.spring.boot:mybatis-spring-boot-starter-test:1.3.0')
+    testCompile('org.mybatis.spring.boot:mybatis-spring-boot-starter-test:1.3.2')
 }
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 1a958be..91ca28c 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 8767f3b..e6a3091 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,5 @@
-#Mon Aug 07 11:04:20 CST 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.7-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.5.1-all.zip
diff --git a/gradlew b/gradlew
index 543c9aa..4d1833a 100755
--- a/gradlew
+++ b/gradlew
@@ -33,11 +33,11 @@ DEFAULT_JVM_OPTS=""
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
 
-warn ( ) {
+warn () {
     echo "$*"
 }
 
-die ( ) {
+die () {
     echo
     echo "$*"
     echo
@@ -155,7 +155,7 @@ if $cygwin ; then
 fi
 
 # Escape application args
-save ( ) {
+save () {
     for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
     echo " "
 }
diff --git a/src/main/java/io/spring/api/ArticlesApi.java b/src/main/java/io/spring/api/ArticlesApi.java
index a4f72d3..56997b4 100644
--- a/src/main/java/io/spring/api/ArticlesApi.java
+++ b/src/main/java/io/spring/api/ArticlesApi.java
@@ -9,7 +9,7 @@ import io.spring.core.article.ArticleRepository;
 import io.spring.core.user.User;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
-import org.hibernate.validator.constraints.NotBlank;
+import javax.validation.constraints.NotBlank;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.ResponseEntity;
 import org.springframework.security.core.annotation.AuthenticationPrincipal;
diff --git a/src/main/java/io/spring/api/CommentsApi.java b/src/main/java/io/spring/api/CommentsApi.java
index eccbd18..ce38bd8 100644
--- a/src/main/java/io/spring/api/CommentsApi.java
+++ b/src/main/java/io/spring/api/CommentsApi.java
@@ -14,7 +14,7 @@ import io.spring.core.comment.CommentRepository;
 import io.spring.core.user.User;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
-import org.hibernate.validator.constraints.NotBlank;
+import javax.validation.constraints.NotBlank;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.ResponseEntity;
 import org.springframework.security.core.annotation.AuthenticationPrincipal;
diff --git a/src/main/java/io/spring/api/CurrentUserApi.java b/src/main/java/io/spring/api/CurrentUserApi.java
index 33115e4..7de1775 100644
--- a/src/main/java/io/spring/api/CurrentUserApi.java
+++ b/src/main/java/io/spring/api/CurrentUserApi.java
@@ -9,7 +9,7 @@ import io.spring.core.user.User;
 import io.spring.core.user.UserRepository;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
-import org.hibernate.validator.constraints.Email;
+import javax.validation.constraints.Email;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.ResponseEntity;
 import org.springframework.security.core.annotation.AuthenticationPrincipal;
diff --git a/src/main/java/io/spring/api/UsersApi.java b/src/main/java/io/spring/api/UsersApi.java
index df291bf..a6e599f 100644
--- a/src/main/java/io/spring/api/UsersApi.java
+++ b/src/main/java/io/spring/api/UsersApi.java
@@ -11,8 +11,8 @@ import io.spring.core.user.User;
 import io.spring.core.user.UserRepository;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
-import org.hibernate.validator.constraints.Email;
-import org.hibernate.validator.constraints.NotBlank;
+import javax.validation.constraints.Email;
+import javax.validation.constraints.NotBlank;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.http.ResponseEntity;
diff --git a/src/main/java/io/spring/api/security/CORSConfig.java b/src/main/java/io/spring/api/security/CORSConfig.java
index e4f5d61..2d30d41 100644
--- a/src/main/java/io/spring/api/security/CORSConfig.java
+++ b/src/main/java/io/spring/api/security/CORSConfig.java
@@ -2,10 +2,10 @@ package io.spring.api.security;
 
 import org.springframework.context.annotation.Configuration;
 import org.springframework.web.servlet.config.annotation.CorsRegistry;
-import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 
 @Configuration
-public class CORSConfig extends WebMvcConfigurerAdapter {
+public class CORSConfig implements WebMvcConfigurer {
     @Override
     public void addCorsMappings(CorsRegistry registry) {
         registry.addMapping("/**")
diff --git a/src/main/java/io/spring/api/security/WebSecurityConfig.java b/src/main/java/io/spring/api/security/WebSecurityConfig.java
index 336d190..02c599c 100644
--- a/src/main/java/io/spring/api/security/WebSecurityConfig.java
+++ b/src/main/java/io/spring/api/security/WebSecurityConfig.java
@@ -1,14 +1,15 @@
 package io.spring.api.security;
 
 import org.springframework.beans.factory.annotation.Value;
-import org.springframework.boot.autoconfigure.security.Http401AuthenticationEntryPoint;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.http.HttpMethod;
+import org.springframework.http.HttpStatus;
 import org.springframework.security.config.annotation.web.builders.HttpSecurity;
 import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
 import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
 import org.springframework.security.config.http.SessionCreationPolicy;
+import org.springframework.security.web.authentication.HttpStatusEntryPoint;
 import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
 import org.springframework.web.cors.CorsConfiguration;
 import org.springframework.web.cors.CorsConfigurationSource;
@@ -40,7 +41,7 @@ public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
         http.csrf().disable()
             .cors()
             .and()
-            .exceptionHandling().authenticationEntryPoint(new Http401AuthenticationEntryPoint("Unauthenticated"))
+            .exceptionHandling().authenticationEntryPoint(new HttpStatusEntryPoint(HttpStatus.UNAUTHORIZED))
             .and()
             .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
             .authorizeRequests()
diff --git a/src/test/java/io/spring/api/ArticleApiTest.java b/src/test/java/io/spring/api/ArticleApiTest.java
index 5f6a75f..dd63a7a 100644
--- a/src/test/java/io/spring/api/ArticleApiTest.java
+++ b/src/test/java/io/spring/api/ArticleApiTest.java
@@ -27,9 +27,9 @@ import java.util.Optional;
 
 import static io.restassured.module.mockmvc.RestAssuredMockMvc.given;
 import static org.hamcrest.core.IsEqual.equalTo;
-import static org.mockito.Matchers.any;
-import static org.mockito.Matchers.anyString;
-import static org.mockito.Matchers.eq;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
diff --git a/src/test/java/io/spring/api/ArticleFavoriteApiTest.java b/src/test/java/io/spring/api/ArticleFavoriteApiTest.java
index 8fc2113..a1e25ae 100644
--- a/src/test/java/io/spring/api/ArticleFavoriteApiTest.java
+++ b/src/test/java/io/spring/api/ArticleFavoriteApiTest.java
@@ -25,8 +25,8 @@ import java.util.stream.Collectors;
 
 import static io.restassured.module.mockmvc.RestAssuredMockMvc.given;
 import static org.hamcrest.core.IsEqual.equalTo;
-import static org.mockito.Matchers.any;
-import static org.mockito.Matchers.eq;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
diff --git a/src/test/java/io/spring/api/ArticlesApiTest.java b/src/test/java/io/spring/api/ArticlesApiTest.java
index 91c1d39..2bb6c1e 100644
--- a/src/test/java/io/spring/api/ArticlesApiTest.java
+++ b/src/test/java/io/spring/api/ArticlesApiTest.java
@@ -23,7 +23,7 @@ import java.util.Optional;
 
 import static io.restassured.module.mockmvc.RestAssuredMockMvc.given;
 import static org.hamcrest.core.IsEqual.equalTo;
-import static org.mockito.Matchers.any;
+import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
diff --git a/src/test/java/io/spring/api/CommentsApiTest.java b/src/test/java/io/spring/api/CommentsApiTest.java
index 3151b08..6e4f4f0 100644
--- a/src/test/java/io/spring/api/CommentsApiTest.java
+++ b/src/test/java/io/spring/api/CommentsApiTest.java
@@ -26,9 +26,9 @@ import java.util.Optional;
 
 import static io.restassured.module.mockmvc.RestAssuredMockMvc.given;
 import static org.hamcrest.core.IsEqual.equalTo;
-import static org.mockito.Matchers.any;
-import static org.mockito.Matchers.anyString;
-import static org.mockito.Matchers.eq;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.when;
 
 @WebMvcTest(CommentsApi.class)
diff --git a/src/test/java/io/spring/api/CurrentUserApiTest.java b/src/test/java/io/spring/api/CurrentUserApiTest.java
index 0560912..5ae2475 100644
--- a/src/test/java/io/spring/api/CurrentUserApiTest.java
+++ b/src/test/java/io/spring/api/CurrentUserApiTest.java
@@ -19,8 +19,8 @@ import java.util.Optional;
 
 import static io.restassured.module.mockmvc.RestAssuredMockMvc.given;
 import static org.hamcrest.core.IsEqual.equalTo;
-import static org.mockito.Matchers.any;
-import static org.mockito.Matchers.eq;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.when;
 
 @WebMvcTest(CurrentUserApi.class)
diff --git a/src/test/java/io/spring/api/ListArticleApiTest.java b/src/test/java/io/spring/api/ListArticleApiTest.java
index 91c2e36..a0762de 100644
--- a/src/test/java/io/spring/api/ListArticleApiTest.java
+++ b/src/test/java/io/spring/api/ListArticleApiTest.java
@@ -18,7 +18,7 @@ import org.springframework.test.web.servlet.MockMvc;
 import static io.restassured.module.mockmvc.RestAssuredMockMvc.given;
 import static io.spring.TestHelper.articleDataFixture;
 import static java.util.Arrays.asList;
-import static org.mockito.Matchers.eq;
+import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.when;
 
 @WebMvcTest(ArticlesApi.class)
diff --git a/src/test/java/io/spring/api/ProfileApiTest.java b/src/test/java/io/spring/api/ProfileApiTest.java
index dddce43..cb69658 100644
--- a/src/test/java/io/spring/api/ProfileApiTest.java
+++ b/src/test/java/io/spring/api/ProfileApiTest.java
@@ -19,7 +19,7 @@ import java.util.Optional;
 
 import static io.restassured.module.mockmvc.RestAssuredMockMvc.given;
 import static org.hamcrest.core.IsEqual.equalTo;
-import static org.mockito.Matchers.eq;
+import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
diff --git a/src/test/java/io/spring/api/TestWithCurrentUser.java b/src/test/java/io/spring/api/TestWithCurrentUser.java
index 67a5a12..9c8f62b 100644
--- a/src/test/java/io/spring/api/TestWithCurrentUser.java
+++ b/src/test/java/io/spring/api/TestWithCurrentUser.java
@@ -12,7 +12,7 @@ import org.springframework.test.context.junit4.SpringRunner;
 
 import java.util.Optional;
 
-import static org.mockito.Matchers.eq;
+import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.when;
 
 @RunWith(SpringRunner.class)
diff --git a/src/test/java/io/spring/api/UsersApiTest.java b/src/test/java/io/spring/api/UsersApiTest.java
index 0176e05..e13ef20 100644
--- a/src/test/java/io/spring/api/UsersApiTest.java
+++ b/src/test/java/io/spring/api/UsersApiTest.java
@@ -26,8 +26,8 @@ import java.util.Optional;
 
 import static io.restassured.module.mockmvc.RestAssuredMockMvc.given;
 import static org.hamcrest.core.IsEqual.equalTo;
-import static org.mockito.Matchers.any;
-import static org.mockito.Matchers.eq;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;