diff --git a/build.gradle b/build.gradle
index 23f6b7b..93d4bbb 100644
--- a/build.gradle
+++ b/build.gradle
@@ -42,6 +42,7 @@ dependencies {
     implementation 'io.netty:netty-all'
     implementation 'com.nimbusds:nimbus-jose-jwt:9.41.1'
     implementation 'org.springframework.cloud:spring-cloud-starter-netflix-eureka-client'
+    implementation 'com.github.ben-manes.caffeine:caffeine:3.1.2'
     testImplementation 'io.projectreactor:reactor-test'
     compileOnly 'org.projectlombok:lombok'
     developmentOnly 'org.springframework.boot:spring-boot-devtools'