diff --git a/src/main/scala/model/package.scala b/src/main/scala/model/package.scala
index 6ba4752..924935e 100644
--- a/src/main/scala/model/package.scala
+++ b/src/main/scala/model/package.scala
@@ -1,6 +1,7 @@
 package object model extends {
-  // TODO
+  // TODO [Slick 2.0]Should be configurable?
   val profile = slick.driver.H2Driver
+  // TODO [Slick 2.0]To avoid compilation error about delete invocation. Why can't this error be resolved by import profile.simple._?
   val simple = profile.simple
 
 } with AccountComponent
diff --git a/src/main/scala/service/AccountService.scala b/src/main/scala/service/AccountService.scala
index 218974f..7472738 100644
--- a/src/main/scala/service/AccountService.scala
+++ b/src/main/scala/service/AccountService.scala
@@ -2,6 +2,7 @@
 
 import model._
 import simple._
+// TODO [Slick 2.0]NOT import directly?
 import model.dateColumnType
 import service.SystemSettingsService.SystemSettings
 import util.StringUtil._
diff --git a/src/main/scala/service/MilestonesService.scala b/src/main/scala/service/MilestonesService.scala
index 9cc7b66..b65fc7b 100644
--- a/src/main/scala/service/MilestonesService.scala
+++ b/src/main/scala/service/MilestonesService.scala
@@ -2,6 +2,7 @@
 
 import model._
 import simple._
+// TODO [Slick 2.0]NOT import directly?
 import model.dateColumnType
 
 trait MilestonesService {