diff --git a/build.sbt b/build.sbt
index 1a04f3a..85368a0 100644
--- a/build.sbt
+++ b/build.sbt
@@ -60,7 +60,7 @@ lazy val core = (project in file("core")).settings(
   },
   libraryDependencies ++= {
     if (scala.util.Properties.isJavaAtLeast("11")) {
-      Seq("ch.qos.logback" % "logback-classic" % "1.5.20" % "test")
+      Seq("ch.qos.logback" % "logback-classic" % "1.5.21" % "test")
     } else {
       Nil
     }