diff --git a/servlet/spring-boot/java/jwt/login/src/main/java/example/RestConfig.java b/servlet/spring-boot/java/jwt/login/src/main/java/example/RestConfig.java
index f652560..b246480 100644
--- a/servlet/spring-boot/java/jwt/login/src/main/java/example/RestConfig.java
+++ b/servlet/spring-boot/java/jwt/login/src/main/java/example/RestConfig.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2020-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,16 @@
 
 package example;
 
+import java.security.interfaces.RSAPrivateKey;
 import java.security.interfaces.RSAPublicKey;
 
+import com.nimbusds.jose.jwk.JWK;
+import com.nimbusds.jose.jwk.JWKSet;
+import com.nimbusds.jose.jwk.RSAKey;
+import com.nimbusds.jose.jwk.source.ImmutableJWKSet;
+import com.nimbusds.jose.jwk.source.JWKSource;
+import com.nimbusds.jose.proc.SecurityContext;
+
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -29,7 +37,9 @@ import org.springframework.security.config.http.SessionCreationPolicy;
 import org.springframework.security.core.userdetails.User;
 import org.springframework.security.core.userdetails.UserDetailsService;
 import org.springframework.security.oauth2.jwt.JwtDecoder;
+import org.springframework.security.oauth2.jwt.JwtEncoder;
 import org.springframework.security.oauth2.jwt.NimbusJwtDecoder;
+import org.springframework.security.oauth2.jwt.NimbusJwtEncoder;
 import org.springframework.security.oauth2.server.resource.web.BearerTokenAuthenticationEntryPoint;
 import org.springframework.security.oauth2.server.resource.web.access.BearerTokenAccessDeniedHandler;
 import org.springframework.security.provisioning.InMemoryUserDetailsManager;
@@ -45,6 +55,9 @@ public class RestConfig extends WebSecurityConfigurerAdapter {
 	@Value("${jwt.public.key}")
 	RSAPublicKey key;
 
+	@Value("${jwt.private.key}")
+	RSAPrivateKey priv;
+
 	@Override
 	protected void configure(HttpSecurity http) throws Exception {
 		// @formatter:off
@@ -77,4 +90,10 @@ public class RestConfig extends WebSecurityConfigurerAdapter {
 		return NimbusJwtDecoder.withPublicKey(this.key).build();
 	}
 
+	@Bean
+	JwtEncoder jwtEncoder() {
+		JWK jwk = new RSAKey.Builder(this.key).privateKey(this.priv).build();
+		JWKSource<SecurityContext> jwks = new ImmutableJWKSet<>(new JWKSet(jwk));
+		return new NimbusJwtEncoder(jwks);
+	}
 }
diff --git a/servlet/spring-boot/java/jwt/login/src/main/java/example/web/TokenController.java b/servlet/spring-boot/java/jwt/login/src/main/java/example/web/TokenController.java
index 5205422..bdb93c8 100644
--- a/servlet/spring-boot/java/jwt/login/src/main/java/example/web/TokenController.java
+++ b/servlet/spring-boot/java/jwt/login/src/main/java/example/web/TokenController.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2020 the original author or authors.
+ * Copyright 2020-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,20 +16,15 @@
 
 package example.web;
 
-import java.security.interfaces.RSAPrivateKey;
 import java.time.Instant;
-import java.util.Date;
 import java.util.stream.Collectors;
 
-import com.nimbusds.jose.JWSAlgorithm;
-import com.nimbusds.jose.JWSHeader;
-import com.nimbusds.jose.crypto.RSASSASigner;
-import com.nimbusds.jwt.JWTClaimsSet;
-import com.nimbusds.jwt.SignedJWT;
-
-import org.springframework.beans.factory.annotation.Value;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.security.core.Authentication;
 import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.oauth2.jwt.JwtClaimsSet;
+import org.springframework.security.oauth2.jwt.JwtEncoder;
+import org.springframework.security.oauth2.jwt.JwtEncoderParameters;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RestController;
 
@@ -41,8 +36,8 @@ import org.springframework.web.bind.annotation.RestController;
 @RestController
 public class TokenController {
 
-	@Value("${jwt.private.key}")
-	RSAPrivateKey key;
+	@Autowired
+	JwtEncoder encoder;
 
 	@PostMapping("/token")
 	public String token(Authentication authentication) {
@@ -52,27 +47,14 @@ public class TokenController {
 		String scope = authentication.getAuthorities().stream()
 				.map(GrantedAuthority::getAuthority)
 				.collect(Collectors.joining(" "));
-		JWTClaimsSet claims = new JWTClaimsSet.Builder()
+		JwtClaimsSet claims = JwtClaimsSet.builder()
 				.issuer("self")
-				.issueTime(new Date(now.toEpochMilli()))
-				.expirationTime(new Date(now.plusSeconds(expiry).toEpochMilli()))
+				.issuedAt(now)
+				.expiresAt(now.plusSeconds(expiry))
 				.subject(authentication.getName())
 				.claim("scope", scope)
 				.build();
 		// @formatter:on
-		JWSHeader header = new JWSHeader.Builder(JWSAlgorithm.RS256).build();
-		SignedJWT jwt = new SignedJWT(header, claims);
-		return sign(jwt).serialize();
+		return this.encoder.encode(JwtEncoderParameters.from(claims)).getTokenValue();
 	}
-
-	SignedJWT sign(SignedJWT jwt) {
-		try {
-			jwt.sign(new RSASSASigner(this.key));
-			return jwt;
-		}
-		catch (Exception ex) {
-			throw new IllegalArgumentException(ex);
-		}
-	}
-
 }