diff --git a/build.sbt b/build.sbt
index 5c9672d8d..591b02d1f 100644
--- a/build.sbt
+++ b/build.sbt
@@ -2,7 +2,12 @@ import Dependencies._
 import Path._
 import com.typesafe.tools.mima.core._, ProblemFilters._
 
-def commonSettings: Seq[Setting[_]] = Def settings (
+val _ = {
+  //https://github.com/sbt/contraband/issues/122
+  sys.props += ("line.separator" -> "\n")
+}
+
+def commonSettings: Seq[Setting[_]] = Def.settings(
   scalaVersion := scala212,
   // publishArtifact in packageDoc := false,
   resolvers += Resolver.typesafeIvyRepo("releases"),
@@ -31,7 +36,7 @@ def commonSettings: Seq[Setting[_]] = Def settings (
 val mimaSettings = Def settings (
   mimaPreviousArtifacts := Set(
     "1.0.0", "1.0.1", "1.0.2", "1.0.3", "1.0.4",
-    "1.1.0", "1.1.1", "1.1.2", "1.1.3",
+    "1.1.0", "1.1.1", "1.1.2", "1.1.3", "1.1.4",
   ) map (version =>
     organization.value %% moduleName.value % version
       cross (if (crossPaths.value) CrossVersion.binary else CrossVersion.disabled)
@@ -54,7 +59,7 @@ lazy val lmRoot = (project in file("."))
         git.baseVersion := "1.2.0",
         version := {
           val v = version.value
-          if (v contains "SNAPSHOT") git.baseVersion.value
+          if (v contains "SNAPSHOT") git.baseVersion.value + "-SNAPSHOT"
           else v
         }
       )),
@@ -215,7 +220,7 @@ lazy val lmIvy = (project in file("ivy"))
   .settings(
     commonSettings,
     name := "librarymanagement-ivy",
-    libraryDependencies ++= Seq(ivy, scalaTest % Test, scalaCheck % Test),
+    libraryDependencies ++= Seq(ivy),
     managedSourceDirectories in Compile +=
       baseDirectory.value / "src" / "main" / "contraband-scala",
     sourceManaged in (Compile, generateContrabands) := baseDirectory.value / "src" / "main" / "contraband-scala",
diff --git a/core/src/main/scala/sbt/librarymanagement/Http.scala b/core/src/main/scala/sbt/librarymanagement/Http.scala
index 9870d9b0f..833a9edc0 100644
--- a/core/src/main/scala/sbt/librarymanagement/Http.scala
+++ b/core/src/main/scala/sbt/librarymanagement/Http.scala
@@ -3,5 +3,5 @@ package sbt.librarymanagement
 import gigahorse._, support.okhttp.Gigahorse
 
 object Http {
-  lazy val http: HttpClient = Gigahorse.http(Gigahorse.config)
+  lazy val http: HttpClient = Gigahorse.http(gigahorse.Config())
 }
diff --git a/ivy/src/main/scala/sbt/internal/librarymanagement/ConvertResolver.scala b/ivy/src/main/scala/sbt/internal/librarymanagement/ConvertResolver.scala
index 0cc3bbbe1..47d597660 100644
--- a/ivy/src/main/scala/sbt/internal/librarymanagement/ConvertResolver.scala
+++ b/ivy/src/main/scala/sbt/internal/librarymanagement/ConvertResolver.scala
@@ -7,7 +7,7 @@ import java.net.URL
 import java.util.Collections
 
 import org.apache.ivy.core.module.descriptor.DependencyDescriptor
-import org.apache.ivy.core.resolve.ResolveData
+import org.apache.ivy.core.resolve.{ DownloadOptions, ResolveData }
 import org.apache.ivy.core.settings.IvySettings
 import org.apache.ivy.plugins.repository.{ RepositoryCopyProgressListener, Resource, TransferEvent }
 import org.apache.ivy.plugins.resolver.{
@@ -30,6 +30,7 @@ import java.io.{ File, IOException }
 
 import org.apache.ivy.util.{ ChecksumHelper, FileUtil, Message }
 import org.apache.ivy.core.module.descriptor.{ Artifact => IArtifact }
+import org.apache.ivy.core.report.DownloadReport
 import sbt.io.IO
 import sbt.util.Logger
 import sbt.librarymanagement._
@@ -181,7 +182,7 @@ private[sbt] object ConvertResolver {
           resolver
         }
         case repo: SshRepository => {
-          val resolver = new SshResolver with DescriptorRequired {
+          val resolver = new SshResolver with DescriptorRequired with ThreadSafeSshBasedResolver {
             override val managedChecksumsEnabled: Boolean = managedChecksums
             override def getResource(resource: Resource, dest: File): Long = get(resource, dest)
           }
@@ -190,7 +191,7 @@ private[sbt] object ConvertResolver {
           resolver
         }
         case repo: SftpRepository => {
-          val resolver = new SFTPResolver
+          val resolver = new SFTPResolver with ThreadSafeSshBasedResolver
           initializeSSHResolver(resolver, repo, settings)
           resolver
         }
@@ -405,4 +406,15 @@ private[sbt] object ConvertResolver {
       }
     }
   }
+
+  private sealed trait ThreadSafeSshBasedResolver
+      extends org.apache.ivy.plugins.resolver.AbstractSshBasedResolver {
+//uncomment to test non-threadsafe behavior
+//    private def lock = new Object
+    private val lock = org.apache.ivy.plugins.repository.ssh.SshCache.getInstance
+    override def download(artifacts: Array[IArtifact], options: DownloadOptions): DownloadReport =
+      lock.synchronized {
+        super.download(artifacts, options)
+      }
+  }
 }
diff --git a/ivy/src/main/scala/sbt/internal/librarymanagement/ivyint/GigahorseUrlHandler.scala b/ivy/src/main/scala/sbt/internal/librarymanagement/ivyint/GigahorseUrlHandler.scala
index fd11a35fe..4c80cd152 100644
--- a/ivy/src/main/scala/sbt/internal/librarymanagement/ivyint/GigahorseUrlHandler.scala
+++ b/ivy/src/main/scala/sbt/internal/librarymanagement/ivyint/GigahorseUrlHandler.scala
@@ -214,7 +214,7 @@ object GigahorseUrlHandler {
 
   private val EmptyBuffer: Array[Byte] = new Array[Byte](0)
 
-  lazy val http: HttpClient = Gigahorse.http(Gigahorse.config)
+  lazy val http: HttpClient = Gigahorse.http(gigahorse.Config())
 
   private lazy val okHttpClient: OkHttpClient = {
     http
diff --git a/ivy/src/main/scala/sbt/internal/librarymanagement/ivyint/SbtChainResolver.scala b/ivy/src/main/scala/sbt/internal/librarymanagement/ivyint/SbtChainResolver.scala
index d16ec40e3..3e70ecafc 100644
--- a/ivy/src/main/scala/sbt/internal/librarymanagement/ivyint/SbtChainResolver.scala
+++ b/ivy/src/main/scala/sbt/internal/librarymanagement/ivyint/SbtChainResolver.scala
@@ -85,8 +85,8 @@ private[sbt] case class SbtChainResolver(
       dd: DependencyDescriptor,
       data: ResolveData
   ): ResolvedModuleRevision = {
-    if (data.getOptions.getLog != LogOptions.LOG_QUIET)
-      Message.debug("Resolving " + dd.getDependencyRevisionId + " ...")
+    if (data.getOptions.getLog == LogOptions.LOG_DEFAULT)
+      Message.info("Resolving " + dd.getDependencyRevisionId + " ...")
     val gd = CustomSbtResolution.getDependency(dd, data)
     val mod = IvySbt.resetArtifactResolver(gd)
     mod
diff --git a/ivy/src/test/scala/sbt/internal/librarymanagement/SftpRepoSpec.scala b/ivy/src/test/scala/sbt/internal/librarymanagement/SftpRepoSpec.scala
new file mode 100644
index 000000000..8da14644a
--- /dev/null
+++ b/ivy/src/test/scala/sbt/internal/librarymanagement/SftpRepoSpec.scala
@@ -0,0 +1,42 @@
+package sbt.internal.librarymanagement
+
+import sbt.io._
+import sbt.io.syntax._
+import sbt.util.Level
+import sbt.librarymanagement._
+import sbt.librarymanagement.syntax._
+import java.nio.file.Paths
+
+//by default this test is ignored
+//to run this you need to change "repo" to point to some sftp repository which contains a dependency referring a dependency in same repo
+//it will then attempt to authenticate via key file and fetch the dependency specified via "org" and "module"
+class SftpRepoSpec extends BaseIvySpecification {
+  val repo: Option[String] = None
+//  val repo: Option[String] = Some("some repo")
+  //a dependency which depends on another in the repo
+  def org(repo: String) = s"com.${repo}"
+  def module(org: String) = org % "some-lib" % "version"
+
+  override def resolvers = {
+    implicit val patterns = Resolver.defaultIvyPatterns
+    repo.map { repo =>
+      val privateKeyFile = Paths.get(sys.env("HOME"), ".ssh", s"id_${repo}").toFile
+      Resolver.sftp(repo, s"repo.${repo}.com", 2222).as(repo, privateKeyFile)
+    }.toVector ++ super.resolvers
+  }
+
+  "resolving multiple deps from sftp repo" should "not hang or fail" in {
+    repo match {
+      case Some(repo) =>
+        IO.delete(currentTarget / "cache" / org(repo))
+        //    log.setLevel(Level.Debug)
+        lmEngine().retrieve(module(org(repo)), scalaModuleInfo = None, currentTarget, log) match {
+          case Right(v) => log.debug(v.toString())
+          case Left(e) =>
+            log.log(Level.Error, e.failedPaths.toString())
+            throw e.resolveException
+        }
+      case None => log.info(s"skipped ${getClass}")
+    }
+  }
+}
diff --git a/project/Dependencies.scala b/project/Dependencies.scala
index 096fd6cd4..9ef21a22b 100644
--- a/project/Dependencies.scala
+++ b/project/Dependencies.scala
@@ -4,7 +4,7 @@ import sbt.contraband.ContrabandPlugin.autoImport._
 
 object Dependencies {
   val scala211 = "2.11.12"
-  val scala212 = "2.12.4"
+  val scala212 = "2.12.6"
 
   private val ioVersion = "1.1.3"
   private val utilVersion = "1.1.3"
@@ -45,8 +45,8 @@ object Dependencies {
   val scalaReflect = Def.setting { "org.scala-lang" % "scala-reflect" % scalaVersion.value }
   val scalaCompiler = Def.setting { "org.scala-lang" % "scala-compiler" % scalaVersion.value }
   val scalaXml = scala211Module("scala-xml", "1.0.5")
-  val scalaTest = "org.scalatest" %% "scalatest" % "3.0.1"
-  val scalaCheck = "org.scalacheck" %% "scalacheck" % "1.13.4"
+  val scalaTest = "org.scalatest" %% "scalatest" % "3.0.5"
+  val scalaCheck = "org.scalacheck" %% "scalacheck" % "1.14.0"
   val sjsonnew = Def.setting {
     "com.eed3si9n" %% "sjson-new-core" % contrabandSjsonNewVersion.value
   }
diff --git a/project/build.properties b/project/build.properties
index 31334bbd3..64cf32f7f 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.1.1
+sbt.version=1.1.4
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 11a6aa3d4..f38b000fe 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,4 +1,4 @@
-addSbtPlugin("org.scala-sbt" % "sbt-houserules"  % "0.3.5")
+addSbtPlugin("org.scala-sbt" % "sbt-houserules"  % "0.3.6")
 addSbtPlugin("org.scala-sbt" % "sbt-contraband"  % "0.4.0")
 addSbtPlugin("org.scala-sbt" % "sbt-contraband"  % "0.3.2")
 addSbtPlugin("com.lightbend" % "sbt-whitesource" % "0.1.9")