diff --git a/src/main/scala/gitbucket/core/model/Milestone.scala b/src/main/scala/gitbucket/core/model/Milestone.scala
index 81c4f2b..491fefd 100644
--- a/src/main/scala/gitbucket/core/model/Milestone.scala
+++ b/src/main/scala/gitbucket/core/model/Milestone.scala
@@ -9,10 +9,10 @@
   class Milestones(tag: Tag) extends Table[Milestone](tag, "MILESTONE") with MilestoneTemplate {
     override val milestoneId = column[Int]("MILESTONE_ID", O AutoInc)
     val title = column[String]("TITLE")
-    val description = column[String]("DESCRIPTION")
-    val dueDate = column[java.util.Date]("DUE_DATE")
-    val closedDate = column[java.util.Date]("CLOSED_DATE")
-    def * = (userName, repositoryName, milestoneId, title, description.?, dueDate.?, closedDate.?) <> (Milestone.tupled, Milestone.unapply)
+    val description = column[Option[String]]("DESCRIPTION")
+    val dueDate = column[Option[java.util.Date]]("DUE_DATE")
+    val closedDate = column[Option[java.util.Date]]("CLOSED_DATE")
+    def * = (userName, repositoryName, milestoneId, title, description, dueDate, closedDate) <> (Milestone.tupled, Milestone.unapply)
 
     def byPrimaryKey(owner: String, repository: String, milestoneId: Int) = byMilestone(owner, repository, milestoneId)
     def byPrimaryKey(userName: Rep[String], repositoryName: Rep[String], milestoneId: Rep[Int]) = byMilestone(userName, repositoryName, milestoneId)
diff --git a/src/main/scala/gitbucket/core/service/MilestonesService.scala b/src/main/scala/gitbucket/core/service/MilestonesService.scala
index 1e95856..276aa7c 100644
--- a/src/main/scala/gitbucket/core/service/MilestonesService.scala
+++ b/src/main/scala/gitbucket/core/service/MilestonesService.scala
@@ -21,7 +21,7 @@
   def updateMilestone(milestone: Milestone)(implicit s: Session): Unit =
     Milestones
       .filter (t =>  t.byPrimaryKey(milestone.userName, milestone.repositoryName, milestone.milestoneId))
-      .map    (t => (t.title, t.description.?, t.dueDate.?, t.closedDate.?))
+      .map    (t => (t.title, t.description, t.dueDate, t.closedDate))
       .update (milestone.title, milestone.description, milestone.dueDate, milestone.closedDate)
 
   def openMilestone(milestone: Milestone)(implicit s: Session): Unit =