diff --git a/librarymanagement/src/main/scala/sbt/internal/librarymanagement/Ivy.scala b/librarymanagement/src/main/scala/sbt/internal/librarymanagement/Ivy.scala
index 76ba4ce33..44c53d826 100644
--- a/librarymanagement/src/main/scala/sbt/internal/librarymanagement/Ivy.scala
+++ b/librarymanagement/src/main/scala/sbt/internal/librarymanagement/Ivy.scala
@@ -30,9 +30,8 @@ import sbt.util.Logger
 import sbt.librarymanagement._
 import Resolver.PluginPattern
 import ivyint.{ CachedResolutionResolveEngine, CachedResolutionResolveCache, SbtDefaultDependencyDescriptor }
-import sbt.internal.util.CacheStore
 
-final class IvySbt(val configuration: IvyConfiguration, fileToStore: File => CacheStore) { self =>
+final class IvySbt(val configuration: IvyConfiguration) { self =>
   import configuration.baseDirectory
 
   /*
@@ -93,8 +92,7 @@ final class IvySbt(val configuration: IvyConfiguration, fileToStore: File => Cac
           setEventManager(new EventManager())
           if (configuration.updateOptions.cachedResolution) {
             setResolveEngine(new ResolveEngine(getSettings, getEventManager, getSortEngine) with CachedResolutionResolveEngine {
-              override private[sbt] val fileToStore: File => CacheStore = self.fileToStore
-              val cachedResolutionResolveCache = IvySbt.cachedResolutionResolveCache(fileToStore)
+              val cachedResolutionResolveCache = IvySbt.cachedResolutionResolveCache
               val projectResolver = prOpt
               def makeInstance = mkIvy
             })
@@ -141,7 +139,7 @@ final class IvySbt(val configuration: IvyConfiguration, fileToStore: File => Cac
     withIvy(log) { i =>
       val prOpt = Option(i.getSettings.getResolver(ProjectResolver.InterProject)) map { case pr: ProjectResolver => pr }
       if (configuration.updateOptions.cachedResolution) {
-        IvySbt.cachedResolutionResolveCache(fileToStore).clean(md, prOpt)
+        IvySbt.cachedResolutionResolveCache.clean(md, prOpt)
       }
     }
 
@@ -251,7 +249,7 @@ private[sbt] object IvySbt {
   val DefaultIvyFilename = "ivy.xml"
   val DefaultMavenFilename = "pom.xml"
   val DefaultChecksums = Vector("sha1", "md5")
-  private[sbt] def cachedResolutionResolveCache(fileToStore: File => CacheStore): CachedResolutionResolveCache = new CachedResolutionResolveCache(fileToStore)
+  private[sbt] def cachedResolutionResolveCache: CachedResolutionResolveCache = new CachedResolutionResolveCache
 
   def defaultIvyFile(project: File) = new File(project, DefaultIvyFilename)
   def defaultIvyConfiguration(project: File) = new File(project, DefaultIvyConfigFilename)
diff --git a/librarymanagement/src/main/scala/sbt/internal/librarymanagement/IvyCache.scala b/librarymanagement/src/main/scala/sbt/internal/librarymanagement/IvyCache.scala
index 80eff7470..ae7d01275 100644
--- a/librarymanagement/src/main/scala/sbt/internal/librarymanagement/IvyCache.scala
+++ b/librarymanagement/src/main/scala/sbt/internal/librarymanagement/IvyCache.scala
@@ -12,16 +12,12 @@ import org.apache.ivy.plugins.repository.{ ArtifactResourceResolver, Resource, R
 import org.apache.ivy.plugins.resolver.util.ResolvedResource
 import org.apache.ivy.util.FileUtil
 import sbt.io.Path
-import sbt.util.Logger
 import sbt.librarymanagement._
-
-import sbt.internal.util.{ CacheStore, FileBasedStore }
+import sbt.util.Logger
 
 import scala.json.ast.unsafe._
 import scala.collection.mutable
 import jawn.{ SupportParser, MutableFacade }
-import sjsonnew.IsoString
-import sjsonnew.support.scalajson.unsafe.{ CompactPrinter, Converter }
 
 class NotInCache(val id: ModuleID, cause: Throwable)
   extends RuntimeException(NotInCache(id, cause), cause) {
@@ -35,9 +31,7 @@ private object NotInCache {
     }
 }
 /** Provides methods for working at the level of a single jar file with the default Ivy cache.*/
-class IvyCache(val ivyHome: Option[File], fileToStore: File => CacheStore) {
-  def this(ivyHome: Option[File]) = this(ivyHome, DefaultFileToStore)
-
+class IvyCache(val ivyHome: Option[File]) {
   def lockFile = new File(ivyHome getOrElse Path.userHome, ".sbt.cache.lock")
   /** Caches the given 'file' with the given ID.  It may be retrieved or cleared using this ID.*/
   def cacheJar(moduleID: ModuleID, file: File, lock: Option[xsbti.GlobalLock], log: Logger): Unit = {
@@ -92,7 +86,7 @@ class IvyCache(val ivyHome: Option[File], fileToStore: File => CacheStore) {
       val local = Resolver.defaultLocal
       val paths = IvyPaths(new File("."), ivyHome)
       val conf = new InlineIvyConfiguration(paths, Vector(local), Vector.empty, Vector.empty, false, lock, IvySbt.DefaultChecksums, None, UpdateOptions(), log)
-      (new IvySbt(conf, fileToStore), local)
+      (new IvySbt(conf), local)
     }
   /** Creates a default jar artifact based on the given ID.*/
   private def defaultArtifact(moduleID: ModuleID): IvyArtifact =
@@ -131,8 +125,3 @@ object FixedParser extends SupportParser[JValue] {
       }
     }
 }
-
-object DefaultFileToStore extends (File => CacheStore) {
-  private implicit lazy val isoString: IsoString[JValue] = IsoString.iso(CompactPrinter.apply _, FixedParser.parseUnsafe _)
-  override def apply(f: File): CacheStore = new FileBasedStore(f, Converter)
-}
diff --git a/librarymanagement/src/main/scala/sbt/internal/librarymanagement/JsonUtil.scala b/librarymanagement/src/main/scala/sbt/internal/librarymanagement/JsonUtil.scala
index df6f6490d..55d7dbd6a 100644
--- a/librarymanagement/src/main/scala/sbt/internal/librarymanagement/JsonUtil.scala
+++ b/librarymanagement/src/main/scala/sbt/internal/librarymanagement/JsonUtil.scala
@@ -3,22 +3,18 @@ package sbt.internal.librarymanagement
 import java.io.File
 import org.apache.ivy.core
 import core.module.descriptor.ModuleDescriptor
-import sbt.util.Logger
-import sbt.internal.util.CacheStore
+import sbt.util.{ CacheStore, Logger }
 import sbt.librarymanagement._
 import sbt.librarymanagement.LibraryManagementCodec._
-import JsonUtil._
 
 private[sbt] object JsonUtil {
   def sbtOrgTemp = "org.scala-sbt.temp"
   def fakeCallerOrganization = "org.scala-sbt.temp-callers"
-}
 
-private[sbt] class JsonUtil(fileToStore: File => CacheStore) {
   def parseUpdateReport(md: ModuleDescriptor, path: File, cachedDescriptor: File, log: Logger): UpdateReport =
     {
       try {
-        val lite = fileToStore(path).read[UpdateReportLite]
+        val lite = CacheStore(path).read[UpdateReportLite]
         fromLite(lite, cachedDescriptor)
       } catch {
         case e: Throwable =>
@@ -29,7 +25,7 @@ private[sbt] class JsonUtil(fileToStore: File => CacheStore) {
   def writeUpdateReport(ur: UpdateReport, graphPath: File): Unit =
     {
       sbt.io.IO.createDirectory(graphPath.getParentFile)
-      fileToStore(graphPath).write(toLite(ur))
+      CacheStore(graphPath).write(toLite(ur))
     }
   def toLite(ur: UpdateReport): UpdateReportLite =
     UpdateReportLite(ur.configurations map { cr =>
diff --git a/librarymanagement/src/main/scala/sbt/internal/librarymanagement/ivyint/CachedResolutionResolveEngine.scala b/librarymanagement/src/main/scala/sbt/internal/librarymanagement/ivyint/CachedResolutionResolveEngine.scala
index 7159e33e9..8b9cb5074 100644
--- a/librarymanagement/src/main/scala/sbt/internal/librarymanagement/ivyint/CachedResolutionResolveEngine.scala
+++ b/librarymanagement/src/main/scala/sbt/internal/librarymanagement/ivyint/CachedResolutionResolveEngine.scala
@@ -21,9 +21,8 @@ import org.apache.ivy.plugins.matcher.{ MapMatcher, PatternMatcher }
 import annotation.tailrec
 import scala.concurrent.duration._
 import sbt.io.{ DirectoryFilter, Hash, IO }
-import sbt.util.Logger
 import sbt.librarymanagement._, syntax._
-import sbt.internal.util.CacheStore
+import sbt.util.Logger
 
 private[sbt] object CachedResolutionResolveCache {
   def createID(organization: String, name: String, revision: String) =
@@ -38,9 +37,8 @@ private[sbt] object CachedResolutionResolveCache {
   lazy val yyyymmdd: SimpleDateFormat = new SimpleDateFormat("yyyy-MM-dd")
 }
 
-private[sbt] class CachedResolutionResolveCache(fileToStore: File => CacheStore) {
+private[sbt] class CachedResolutionResolveCache {
   import CachedResolutionResolveCache._
-  val jsonUtil = new JsonUtil(fileToStore)
   val updateReportCache: concurrent.Map[ModuleRevisionId, Either[ResolveException, UpdateReport]] = concurrent.TrieMap()
   // Used for subproject
   val projectReportCache: concurrent.Map[(ModuleRevisionId, LogicalClock), Either[ResolveException, UpdateReport]] = concurrent.TrieMap()
@@ -165,7 +163,7 @@ private[sbt] class CachedResolutionResolveCache(fileToStore: File => CacheStore)
         else None) match {
           case Some(path) =>
             log.debug(s"parsing ${path.getAbsolutePath.toString}")
-            val ur = jsonUtil.parseUpdateReport(md, path, cachedDescriptor, log)
+            val ur = JsonUtil.parseUpdateReport(md, path, cachedDescriptor, log)
             if (ur.allFiles forall { _.exists }) {
               updateReportCache(md.getModuleRevisionId) = Right(ur)
               Some(Right(ur))
@@ -199,7 +197,7 @@ private[sbt] class CachedResolutionResolveCache(fileToStore: File => CacheStore)
               if (changing) {
                 cleanDynamicGraph()
               }
-              jsonUtil.writeUpdateReport(ur, gp)
+              JsonUtil.writeUpdateReport(ur, gp)
               // limit the update cache size
               if (updateReportCache.size > maxUpdateReportCacheSize) {
                 updateReportCache.remove(updateReportCache.head._1)
@@ -258,9 +256,6 @@ private[sbt] trait CachedResolutionResolveEngine extends ResolveEngine {
   private[sbt] def makeInstance: Ivy
   private[sbt] val ignoreTransitiveForce: Boolean = true
 
-  private[sbt] val fileToStore: File => CacheStore
-  private val jsonUtil = new JsonUtil(fileToStore)
-
   def withIvy[A](log: Logger)(f: Ivy => A): A =
     withIvy(new IvyLoggerInterface(log))(f)
   def withIvy[A](log: MessageLogger)(f: Ivy => A): A =
@@ -432,7 +427,7 @@ private[sbt] trait CachedResolutionResolveEngine extends ResolveEngine {
           if (mr.evicted || mr.problem.nonEmpty) None
           else
             // https://github.com/sbt/sbt/issues/1763
-            Some(mr.withCallers(jsonUtil.filterOutArtificialCallers(mr.callers)))
+            Some(mr.withCallers(JsonUtil.filterOutArtificialCallers(mr.callers)))
         } match {
           case Vector() => None
           case ms       => Some(OrganizationArtifactReport(report0.organization, report0.name, ms))
diff --git a/librarymanagement/src/main/scala/sbt/librarymanagement/DefaultLibraryManagement.scala b/librarymanagement/src/main/scala/sbt/librarymanagement/DefaultLibraryManagement.scala
index 01a87378b..4dddcab78 100644
--- a/librarymanagement/src/main/scala/sbt/librarymanagement/DefaultLibraryManagement.scala
+++ b/librarymanagement/src/main/scala/sbt/librarymanagement/DefaultLibraryManagement.scala
@@ -7,7 +7,7 @@ import sbt.util.Logger
 import sbt.io.Hash
 
 class DefaultLibraryManagement(ivyConfiguration: IvyConfiguration, log: Logger) extends LibraryManagement {
-  private[sbt] val ivySbt: IvySbt = new IvySbt(ivyConfiguration, DefaultFileToStore)
+  private[sbt] val ivySbt: IvySbt = new IvySbt(ivyConfiguration)
   private val sbtOrgTemp = JsonUtil.sbtOrgTemp
   private val modulePrefixTemp = "temp-module-"
 
diff --git a/librarymanagement/src/test/scala/BaseIvySpecification.scala b/librarymanagement/src/test/scala/BaseIvySpecification.scala
index 7906abb4f..1400db7ac 100644
--- a/librarymanagement/src/test/scala/BaseIvySpecification.scala
+++ b/librarymanagement/src/test/scala/BaseIvySpecification.scala
@@ -8,13 +8,6 @@ import sbt.internal.util.ConsoleLogger
 import sbt.librarymanagement._
 import Configurations._
 
-import sbt.internal.util.FileBasedStore
-
-import sjsonnew.IsoString
-import sjsonnew.support.scalajson.unsafe.{ CompactPrinter, Converter }
-
-import scala.json.ast.unsafe.JValue
-
 trait BaseIvySpecification extends UnitSpec {
   def currentBase: File = new File(".")
   def currentTarget: File = currentBase / "target" / "ivyhome"
@@ -22,8 +15,6 @@ trait BaseIvySpecification extends UnitSpec {
   def currentDependency: File = currentBase / "target" / "dependency"
   def defaultModuleId: ModuleID = ModuleID("com.example", "foo", "0.1.0").withConfigurations(Some("compile"))
 
-  implicit val isoString: IsoString[JValue] = IsoString.iso(CompactPrinter.apply, FixedParser.parseUnsafe)
-  val fileToStore = (f: File) => new FileBasedStore(f, Converter)
   lazy val log = ConsoleLogger()
 
   def configurations = Vector(Compile, Test, Runtime)
@@ -47,7 +38,7 @@ trait BaseIvySpecification extends UnitSpec {
       moduleInfo = ModuleInfo("foo"),
       dependencies = deps
     ).withConfigurations(configurations)
-    val ivySbt = new IvySbt(mkIvyConfiguration(uo), fileToStore)
+    val ivySbt = new IvySbt(mkIvyConfiguration(uo))
     new ivySbt.Module(moduleSetting)
   }
 
diff --git a/librarymanagement/src/test/scala/CustomPomParserTest.scala b/librarymanagement/src/test/scala/CustomPomParserTest.scala
index ba4b48161..e40771325 100644
--- a/librarymanagement/src/test/scala/CustomPomParserTest.scala
+++ b/librarymanagement/src/test/scala/CustomPomParserTest.scala
@@ -16,7 +16,7 @@ class CustomPomParserTest extends UnitSpec {
       val local = MavenRepository("Test Repo", repoUrl.toExternalForm)
       val paths = IvyPaths(new File("."), Some(cacheDir))
       val conf = new InlineIvyConfiguration(paths, Vector(local), Vector.empty, Vector.empty, false, None, Vector("sha1", "md5"), None, UpdateOptions(), log)
-      val ivySbt = new IvySbt(conf, DefaultFileToStore)
+      val ivySbt = new IvySbt(conf)
       val resolveOpts = new ResolveOptions().setConfs(Array("default"))
       val mrid = ModuleRevisionId.newInstance("com.test", "test-artifact", "1.0.0-SNAPSHOT")
 
diff --git a/project/Dependencies.scala b/project/Dependencies.scala
index 3da73e3cc..8777d53e7 100644
--- a/project/Dependencies.scala
+++ b/project/Dependencies.scala
@@ -5,8 +5,8 @@ object Dependencies {
   val scala211 = "2.11.8"
   val scala212 = "2.12.1"
 
-  private val ioVersion = "1.0.0-M10"
-  private val utilVersion = "1.0.0-M22"
+  private val ioVersion = "1.0.0-M11"
+  private val utilVersion = "1.0.0-M23"
 
   private val sbtIO = "org.scala-sbt" %% "io" % ioVersion
 
diff --git a/project/build.properties b/project/build.properties
index 27e88aa11..64317fdae 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=0.13.13
+sbt.version=0.13.15