diff --git a/rxjava-tutorial/build.gradle b/rxjava-tutorial/build.gradle
index ebfa593..20f39af 100644
--- a/rxjava-tutorial/build.gradle
+++ b/rxjava-tutorial/build.gradle
@@ -19,7 +19,7 @@ dependencies {
     implementation 'org.springframework.boot:spring-boot-starter-actuator'
     implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
     implementation 'org.springframework.boot:spring-boot-starter-web'
-    implementation 'io.reactivex.rxjava3:rxjava:3.1.8'
+    implementation 'io.reactivex.rxjava3:rxjava:3.1.12'
     implementation 'org.projectlombok:lombok:1.18.32'
     runtimeOnly 'com.h2database:h2:2.2.224'
     testImplementation 'org.springframework.boot:spring-boot-starter-test'