diff --git a/project/Dependencies.scala b/project/Dependencies.scala
index 5f1555266..97930ff10 100644
--- a/project/Dependencies.scala
+++ b/project/Dependencies.scala
@@ -17,7 +17,7 @@ object Dependencies {
   val avsCommonsVersion = "2.26.0"
 
   val atmosphereJSVersion = "3.1.3"
-  val atmosphereVersion = "2.7.16"
+  val atmosphereVersion = "4.0.20"
 
   val monixVersion = "3.4.1" // udash-rest only