diff --git a/project/Versions.scala b/project/Versions.scala
index 1c087d6173..00094350a7 100644
--- a/project/Versions.scala
+++ b/project/Versions.scala
@@ -44,7 +44,7 @@ object Versions {
   val playServer = "3.0.4"
   val play29Client = "2.2.7"
   val play29Server = "2.9.4"
-  val tethys = "0.28.3"
+  val tethys = "0.28.4"
   val vertx = "4.5.8"
   val jsScalaJavaTime = "2.6.0"
   val nativeScalaJavaTime = "2.4.0-M3"