diff --git a/project/Dependencies.scala b/project/Dependencies.scala
index fa9c75739a9..b4238af6af4 100644
--- a/project/Dependencies.scala
+++ b/project/Dependencies.scala
@@ -7,7 +7,7 @@ import Keys._
 import buildinfo.BuildInfo
 
 object Dependencies {
-  val akkaVersion: String = sys.props.getOrElse("akka.version", "2.6.5")
+  val akkaVersion: String = sys.props.getOrElse("akka.version", "2.6.6")
   val akkaHttpVersion     = "10.1.12"
 
   val sslConfig = "com.typesafe" %% "ssl-config-core" % "0.4.2"