diff --git a/sbt/src/server-test/handshake/build.sbt b/sbt/src/server-test/handshake/build.sbt
index 9c4f59ef8..02f5f81fd 100644
--- a/sbt/src/server-test/handshake/build.sbt
+++ b/sbt/src/server-test/handshake/build.sbt
@@ -1,23 +1,23 @@
-// import sbt.internal.ServerHandler
+import sbt.internal.server.{ ServerHandler, ServerIntent }
 
 lazy val root = (project in file("."))
   .settings(
     Global / serverLog / logLevel := Level.Debug,
 
     // custom handler
-    // Global / serverHandlers += ServerHandler({ callback =>
-    //   import callback._
-    //   import sjsonnew.BasicJsonProtocol._
-    //   import sbt.internal.protocol.JsonRpcRequestMessage
-    //   ServerIntent(
-    //     {
-    //       case r: JsonRpcRequestMessage if r.method == "lunar/helo" =>
-    //         jsonRpcNotify("lunar/oleh", "")
-    //         ()
-    //     },
-    //     PartialFunction.empty
-    //   )
-    // }),
+    Global / serverHandlers += ServerHandler({ callback =>
+      import callback._
+      import sjsonnew.BasicJsonProtocol._
+      import sbt.internal.protocol.JsonRpcRequestMessage
+      ServerIntent(
+        {
+          case r: JsonRpcRequestMessage if r.method == "lunar/helo" =>
+            jsonRpcNotify("lunar/oleh", "")
+            ()
+        },
+        PartialFunction.empty
+      )
+    }),
 
     name := "handshake",
     scalaVersion := "2.12.3",