diff --git a/servlet/spring-boot/java/oauth2/authorization-server/build.gradle b/servlet/spring-boot/java/oauth2/authorization-server/build.gradle
index 3fc25af..23bba37 100644
--- a/servlet/spring-boot/java/oauth2/authorization-server/build.gradle
+++ b/servlet/spring-boot/java/oauth2/authorization-server/build.gradle
@@ -13,7 +13,7 @@ repositories {
 
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-web'
-	implementation 'org.springframework.security:spring-security-oauth2-authorization-server:0.2.3'
+	implementation 'org.springframework.security:spring-security-oauth2-authorization-server:0.3.1'
 
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'
 	testImplementation 'org.springframework.security:spring-security-test'