diff --git a/server/build.gradle.kts b/server/build.gradle.kts
index bfbbcd9..03bfd93 100644
--- a/server/build.gradle.kts
+++ b/server/build.gradle.kts
@@ -12,7 +12,7 @@ dependencies {
     implementation("com.linecorp.armeria:armeria")
     implementation("com.linecorp.armeria:armeria-logback")
 
-    runtimeOnly("ch.qos.logback:logback-classic:1.5.8")
+    runtimeOnly("ch.qos.logback:logback-classic:1.5.9")
     runtimeOnly("org.slf4j:log4j-over-slf4j:2.0.16")
 }