diff --git a/main/src/main/scala/sbt/Defaults.scala b/main/src/main/scala/sbt/Defaults.scala
index cfdddd6a7..166745552 100755
--- a/main/src/main/scala/sbt/Defaults.scala
+++ b/main/src/main/scala/sbt/Defaults.scala
@@ -30,7 +30,7 @@ import sbt.internal._
 import sbt.internal.inc.JavaInterfaceUtil._
 import sbt.internal.inc.ZincUtil
 import sbt.internal.io.{ Source, WatchState }
-import sbt.internal.librarymanagement._
+import sbt.internal.librarymanagement.{ CustomHttp => _, _ }
 import sbt.internal.librarymanagement.mavenint.{
   PomExtraDependencyAttributes,
   SbtPomExtraProperties
@@ -217,6 +217,8 @@ object Defaults extends BuildCommon {
       artifactClassifier :== None,
       checksums := Classpaths.bootChecksums(appConfiguration.value),
       conflictManager := ConflictManager.default,
+      CustomHttp.okhttpClientBuilder :== CustomHttp.defaultHttpClientBuilder,
+      CustomHttp.okhttpClient := CustomHttp.okhttpClientBuilder.value.build,
       pomExtra :== NodeSeq.Empty,
       pomPostProcess :== idFun,
       pomAllRepositories :== false,
@@ -2180,8 +2182,11 @@ object Classpaths {
         )
       else None
     },
-    dependencyResolution := IvyDependencyResolution(ivyConfiguration.value),
-    publisher := IvyPublisher(ivyConfiguration.value),
+    dependencyResolution := IvyDependencyResolution(
+      ivyConfiguration.value,
+      CustomHttp.okhttpClient.value
+    ),
+    publisher := IvyPublisher(ivyConfiguration.value, CustomHttp.okhttpClient.value),
     ivyConfiguration := mkIvyConfiguration.value,
     ivyConfigurations := {
       val confs = thisProject.value.configurations
@@ -2428,7 +2433,7 @@ object Classpaths {
   private[sbt] def ivySbt0: Initialize[Task[IvySbt]] =
     Def.task {
       Credentials.register(credentials.value, streams.value.log)
-      new IvySbt(ivyConfiguration.value)
+      new IvySbt(ivyConfiguration.value, CustomHttp.okhttpClient.value)
     }
   def moduleSettings0: Initialize[Task[ModuleSettings]] = Def.task {
     ModuleDescriptorConfiguration(projectID.value, projectInfo.value)
@@ -2499,7 +2504,10 @@ object Classpaths {
               ).withScalaOrganization(scalaOrganization.value)
             )
           },
-          dependencyResolution := IvyDependencyResolution(ivyConfiguration.value),
+          dependencyResolution := IvyDependencyResolution(
+            ivyConfiguration.value,
+            CustomHttp.okhttpClient.value
+          ),
           updateSbtClassifiers in TaskGlobal := (Def.task {
             val lm = dependencyResolution.value
             val s = streams.value
diff --git a/main/src/main/scala/sbt/internal/CustomHttp.scala b/main/src/main/scala/sbt/internal/CustomHttp.scala
new file mode 100644
index 000000000..c62cce702
--- /dev/null
+++ b/main/src/main/scala/sbt/internal/CustomHttp.scala
@@ -0,0 +1,18 @@
+package sbt.internal
+
+import sbt.internal.librarymanagement.{ CustomHttp => LMCustomHttp }
+import okhttp3._
+
+import sbt.BuildSyntax._
+import sbt.KeyRanks._
+
+object CustomHttp {
+  val okhttpClientBuilder =
+    settingKey[OkHttpClient.Builder]("Builder for the HTTP client.").withRank(CSetting)
+  val okhttpClient =
+    settingKey[OkHttpClient]("HTTP client used for library management.").withRank(CSetting)
+
+  def defaultHttpClientBuilder: OkHttpClient.Builder = {
+    LMCustomHttp.defaultHttpClientBuilder
+  }
+}
diff --git a/project/Dependencies.scala b/project/Dependencies.scala
index be9c738d9..d866e9d98 100644
--- a/project/Dependencies.scala
+++ b/project/Dependencies.scala
@@ -14,7 +14,7 @@ object Dependencies {
   private val lmVersion =
     sys.props.get("sbt.build.lm.version") match {
       case Some(version) => version
-      case _             => "1.3.0-M2"
+      case _             => "1.3.0-M3"
     }
   private val zincVersion = "1.3.0-M3"