diff --git a/backend/ongi/build.gradle b/backend/ongi/build.gradle
index 1e7823a..d44b58f 100644
--- a/backend/ongi/build.gradle
+++ b/backend/ongi/build.gradle
@@ -34,7 +34,7 @@ dependencies {
     implementation 'org.springframework.boot:spring-boot-starter-validation'
     implementation 'org.springframework.boot:spring-boot-starter-web'
     implementation 'org.springframework.security:spring-security-crypto'
-    implementation 'org.bouncycastle:bcprov-jdk18on:1.81'
+    implementation 'org.bouncycastle:bcprov-jdk18on:1.84'
     compileOnly 'org.projectlombok:lombok'
     annotationProcessor 'org.projectlombok:lombok'
     runtimeOnly 'com.mysql:mysql-connector-j'