diff --git a/ivy/src/main/scala/sbt/Artifact.scala b/ivy/src/main/scala/sbt/Artifact.scala
index f24c93267..4cafb0e67 100644
--- a/ivy/src/main/scala/sbt/Artifact.scala
+++ b/ivy/src/main/scala/sbt/Artifact.scala
@@ -126,7 +126,7 @@ object Artifact {
     val tag = implicitly[FastTypeTag[Artifact]]
     def unpickle(tpe: String, reader: PReader): Any = {
       reader.pushHints()
-      reader.hintTag(tag)
+      // reader.hintTag(tag)
       reader.beginEntry()
       val name = stringPickler.unpickleEntry(reader.readField("name")).asInstanceOf[String]
       val tp = stringPickler.unpickleEntry(reader.readField("type")).asInstanceOf[String]
diff --git a/ivy/src/main/scala/sbt/DatePicklers.scala b/ivy/src/main/scala/sbt/DatePicklers.scala
deleted file mode 100644
index 166f50f2d..000000000
--- a/ivy/src/main/scala/sbt/DatePicklers.scala
+++ /dev/null
@@ -1,35 +0,0 @@
-package sbt
-
-import sbt.serialization._
-import java.{ util => ju }
-
-private[sbt] object DatePicklers {
-  private val longTag = implicitly[FastTypeTag[Long]]
-  implicit val datePickler: Pickler[ju.Date] = new Pickler[ju.Date] {
-    val tag = implicitly[FastTypeTag[ju.Date]]
-    def pickle(a: ju.Date, builder: PBuilder): Unit = {
-      builder.pushHints()
-      builder.hintTag(tag)
-      builder.beginEntry(a)
-      builder.putField("value", { b =>
-        b.hintTag(longTag)
-        longPickler.pickle(a.getTime, b)
-      })
-      builder.endEntry()
-      builder.popHints()
-    }
-  }
-  implicit val dateUnpickler: Unpickler[ju.Date] = new Unpickler[ju.Date] {
-    val tag = implicitly[FastTypeTag[ju.Date]]
-    def unpickle(tpe: String, reader: PReader): Any = {
-      reader.pushHints()
-      reader.hintTag(tag)
-      reader.beginEntry()
-      val a0 = longPickler.unpickleEntry(reader.readField("value")).asInstanceOf[Long]
-      val result = new ju.Date(a0)
-      reader.endEntry()
-      reader.popHints()
-      result
-    }
-  }
-}
diff --git a/ivy/src/main/scala/sbt/FileMapPicklers.scala b/ivy/src/main/scala/sbt/FileMapPicklers.scala
deleted file mode 100644
index 8a7314118..000000000
--- a/ivy/src/main/scala/sbt/FileMapPicklers.scala
+++ /dev/null
@@ -1,22 +0,0 @@
-package sbt
-
-import java.io.File
-import sbt.serialization._
-import java.net.URI
-
-object FileMapPicklers {
-  implicit def fileMapPickler[A: Pickler: Unpickler: FastTypeTag]: Pickler[Map[File, A]] with Unpickler[Map[File, A]] = new Pickler[Map[File, A]] with Unpickler[Map[File, A]] {
-    val tag = implicitly[FastTypeTag[Map[File, A]]]
-    val stringAMapPickler = implicitly[Pickler[Map[String, A]]]
-    val stringAMapUnpickler = implicitly[Unpickler[Map[String, A]]]
-
-    def pickle(m: Map[File, A], builder: PBuilder): Unit =
-      stringAMapPickler.pickle(Map(m.toSeq map { case (k, v) => (k.toURI.toASCIIString, v) }: _*), builder)
-
-    def unpickle(tpe: String, reader: PReader): Any =
-      Map(stringAMapUnpickler.unpickle(tpe, reader).asInstanceOf[Map[String, A]].toSeq map {
-        case (k, v) =>
-          (new File(new URI(k)), v)
-      }: _*).asInstanceOf[Map[File, A]]
-  }
-}
diff --git a/ivy/src/main/scala/sbt/PairPicklers.scala b/ivy/src/main/scala/sbt/PairPicklers.scala
deleted file mode 100644
index 2229059f2..000000000
--- a/ivy/src/main/scala/sbt/PairPicklers.scala
+++ /dev/null
@@ -1,44 +0,0 @@
-package sbt
-
-import sbt.serialization._
-
-private[sbt] object PairPicklers {
-  implicit def pairPickler[A1: FastTypeTag: Pickler: Unpickler, A2: FastTypeTag: Pickler: Unpickler](): Pickler[(A1, A2)] with Unpickler[(A1, A2)] =
-    new Pickler[(A1, A2)] with Unpickler[(A1, A2)] {
-      val a1Tag = implicitly[FastTypeTag[A1]]
-      val a2Tag = implicitly[FastTypeTag[A2]]
-      val tag = implicitly[FastTypeTag[(A1, A2)]]
-      val a1Pickler = implicitly[Pickler[A1]]
-      val a1Unpickler = implicitly[Unpickler[A1]]
-      val a2Pickler = implicitly[Pickler[A2]]
-      val a2Unpickler = implicitly[Unpickler[A2]]
-
-      def pickle(a: (A1, A2), builder: PBuilder): Unit = {
-        builder.pushHints()
-        builder.hintTag(tag)
-        builder.beginEntry(a)
-        builder.putField("_1", { b =>
-          b.hintTag(a1Tag)
-          a1Pickler.pickle(a._1, b)
-        })
-        builder.putField("_2", { b =>
-          b.hintTag(a2Tag)
-          a2Pickler.pickle(a._2, b)
-        })
-        builder.endEntry()
-        builder.popHints()
-      }
-
-      def unpickle(tpe: String, reader: PReader): Any = {
-        reader.pushHints()
-        reader.hintTag(tag)
-        reader.beginEntry()
-        val a0 = a1Unpickler.unpickleEntry(reader.readField("_1")).asInstanceOf[A1]
-        val a1 = a2Unpickler.unpickleEntry(reader.readField("_2")).asInstanceOf[A2]
-        val result = (a0, a1)
-        reader.endEntry()
-        reader.popHints()
-        result
-      }
-    }
-}
diff --git a/ivy/src/main/scala/sbt/UpdateReport.scala b/ivy/src/main/scala/sbt/UpdateReport.scala
index 672f6abc1..5a866632a 100644
--- a/ivy/src/main/scala/sbt/UpdateReport.scala
+++ b/ivy/src/main/scala/sbt/UpdateReport.scala
@@ -159,13 +159,6 @@ object ModuleReport {
   def apply(module: ModuleID, artifacts: Seq[(Artifact, File)], missingArtifacts: Seq[Artifact]): ModuleReport =
     new ModuleReport(module, artifacts, missingArtifacts, None, None, None, None,
       false, None, None, None, None, Map(), None, None, Nil, Nil, Nil)
-
-  import PairPicklers._
-  import DatePicklers._
-  private implicit val afPairPickler: Pickler[(Artifact, File)] with Unpickler[(Artifact, File)] =
-    pairPickler[Artifact, File]
-  private implicit def tuplePickler2: Pickler[(String, Option[String])] with Unpickler[(String, Option[String])] =
-    pairPickler[String, Option[String]]
   implicit val pickler: Pickler[ModuleReport] with Unpickler[ModuleReport] = PicklerUnpickler.generate[ModuleReport]
 }
 
@@ -289,7 +282,6 @@ object UpdateReport {
       }
   }
 
-  import FileMapPicklers._
   private val vectorConfigurationReportPickler = implicitly[Pickler[Vector[ConfigurationReport]]]
   private val vectorConfigurationReportUnpickler = implicitly[Unpickler[Vector[ConfigurationReport]]]
   private val updateStatsPickler = implicitly[Pickler[UpdateStats]]
diff --git a/project/Dependencies.scala b/project/Dependencies.scala
index 8bb961a54..c7a8aa0f0 100644
--- a/project/Dependencies.scala
+++ b/project/Dependencies.scala
@@ -12,7 +12,7 @@ object Dependencies {
   lazy val ivy = "org.scala-sbt.ivy" % "ivy" % "2.3.0-sbt-fccfbd44c9f64523b61398a0155784dcbaeae28f"
   lazy val jsch = "com.jcraft" % "jsch" % "0.1.46" intransitive ()
   lazy val sbinary = "org.scala-tools.sbinary" %% "sbinary" % "0.4.2"
-  lazy val sbtSerialization = "org.scala-sbt" %% "serialization" % "0.1.1-1479903c3135da50e0442c91e707743311a4f362"
+  lazy val sbtSerialization = "org.scala-sbt" %% "serialization" % "0.1.1"
   lazy val scalaCompiler = Def.setting { "org.scala-lang" % "scala-compiler" % scalaVersion.value }
   lazy val testInterface = "org.scala-sbt" % "test-interface" % "1.0"
   lazy val scalaCheck = "org.scalacheck" %% "scalacheck" % "1.11.4"