diff --git a/build.sbt b/build.sbt
index 8250671..a6a40cc 100644
--- a/build.sbt
+++ b/build.sbt
@@ -2,8 +2,8 @@ name := "buddychat"
 
 version := "1.0"
 
-scalaVersion := "2.10.2"
+scalaVersion := "2.13.1"
 
 libraryDependencies ++= Seq(
-  "com.typesafe.akka" %% "akka-actor" % "2.2-M3"
+  "com.typesafe.akka" %% "akka-actor" % "2.5.23"
 )
diff --git a/project/build.properties b/project/build.properties
new file mode 100644
index 0000000..8522443
--- /dev/null
+++ b/project/build.properties
@@ -0,0 +1 @@
+sbt.version=1.3.2
diff --git a/src/main/scala/scottdanzig/buddychat/actors/ChatManager.scala b/src/main/scala/scottdanzig/buddychat/actors/ChatManager.scala
index b1c3aa7..52b1f6d 100644
--- a/src/main/scala/scottdanzig/buddychat/actors/ChatManager.scala
+++ b/src/main/scala/scottdanzig/buddychat/actors/ChatManager.scala
@@ -62,7 +62,7 @@ class ChatManager extends Actor with FSM[State, Data] {
         "-- Begin server chat log --")
       msgsIfAny.foreach(println(_))
       println("-- End server chat log --")
-      context.system.shutdown
+      context.system.terminate()
       stay
     }
     case Event(e, s) => {