diff --git a/build.mill b/build.mill
index 4f4b6a9..1e93d7b 100644
--- a/build.mill
+++ b/build.mill
@@ -71,7 +71,7 @@ object castor extends Module {
   trait ActorJvmModule extends ActorModule {
     object test extends ScalaTests with ActorTestModule{
       def mvnDeps = super.mvnDeps() ++ Seq(
-        mvn"com.lihaoyi::os-lib:0.9.1"
+        mvn"com.lihaoyi::os-lib:0.9.3"
       )
     }
   }