diff --git a/build.sbt b/build.sbt
index 414daee..4e3ab52 100644
--- a/build.sbt
+++ b/build.sbt
@@ -73,7 +73,7 @@ crossPaths       := false
 
 libraryDependencies ++= Seq(
   "junit"               % "junit"              % "4.13.2"   % "test",
-  "org.codehaus.plexus" % "plexus-classworlds" % "2.8.0"    % "test",
+  "org.codehaus.plexus" % "plexus-classworlds" % "2.9.0"    % "test",
   "org.xerial.java"     % "xerial-core"        % "2.1"      % "test",
   "org.wvlet.airframe" %% "airframe-log"       % "2025.1.1" % "test",
   "org.osgi"            % "org.osgi.core"      % "6.0.0"    % "provided",