diff --git a/project/Dependencies.scala b/project/Dependencies.scala
index f4423b4d..52c074b1 100644
--- a/project/Dependencies.scala
+++ b/project/Dependencies.scala
@@ -2,7 +2,7 @@ import sbt._
 import Keys._
 
 object Dependencies {
-  val scalatestVersion = "3.0.0"
+  val scalatestVersion = "2.2.5"
   val scalatest = "org.scalatest" %% "scalatest" % scalatestVersion % "test"
   val scalacheckVersion = "1.12.4"
   val scalacheck = "org.scalacheck" %% "scalacheck" % scalacheckVersion % "test"