diff --git a/project/Build.scala b/project/Build.scala
index ad13f1f..2d3a724 100644
--- a/project/Build.scala
+++ b/project/Build.scala
@@ -3,7 +3,7 @@ import Keys._
 import com.twitter.sbt._
 
 object Libkestrel extends Build {
-  val utilVersion = "4.0.0"
+  val utilVersion = "4.0.1"
 
   lazy val root = Project(
     id = "libkestrel",