diff --git a/src/main/scala-sbt-0.13/sbt/dependencygraph/DependencyGraphSbtCompat.scala b/src/main/scala-sbt-0.13/sbt/dependencygraph/DependencyGraphSbtCompat.scala
index 694eab1d3..cb65aa82c 100644
--- a/src/main/scala-sbt-0.13/sbt/dependencygraph/DependencyGraphSbtCompat.scala
+++ b/src/main/scala-sbt-0.13/sbt/dependencygraph/DependencyGraphSbtCompat.scala
@@ -1,7 +1,81 @@
-package sbt.dependencygraph
+package sbt
+package dependencygraph
+
+import scala.language.implicitConversions
+
+import java.util.concurrent.TimeUnit
+
+import Keys._
+import Def.Initialize
+import CrossVersion._
+
+import scala.concurrent.duration.FiniteDuration
 
 object DependencyGraphSbtCompat {
   object Implicits {
     implicit def convertConfig(config: sbt.Configuration): String = config.toString
+
+    implicit class RichUpdateConfiguration(val updateConfig: UpdateConfiguration) extends AnyVal {
+      def withMissingOk(missingOk: Boolean): UpdateConfiguration =
+        updateConfig.copy(missingOk = missingOk)
+    }
+  }
+
+  /**
+    * This is copied directly from https://github.com/sbt/sbt/blob/2952a2b9b672c5402b824ad2d2076243eb643598/main/src/main/scala/sbt/Defaults.scala#L1471-L1523
+    * and then changed to update the UpdateConfiguration to ignore missing artifacts.
+    */
+  def updateTask(task: TaskKey[_]): Initialize[Task[UpdateReport]] = Def.task {
+    val depsUpdated = transitiveUpdate.value.exists(!_.stats.cached)
+    val isRoot = executionRoots.value contains resolvedScoped.value
+    val forceUpdate = forceUpdatePeriod.value
+    val s = streams.value
+    val fullUpdateOutput = s.cacheDirectory / "out"
+    val forceUpdateByTime = forceUpdate match {
+      case None => false
+      case Some(period) =>
+        val elapsedDuration = new FiniteDuration(System.currentTimeMillis() - fullUpdateOutput.lastModified(), TimeUnit.MILLISECONDS)
+        fullUpdateOutput.exists() && elapsedDuration > period
+    }
+    val scalaProvider = appConfiguration.value.provider.scalaProvider
+
+    // Only substitute unmanaged jars for managed jars when the major.minor parts of the versions the same for:
+    //   the resolved Scala version and the scalaHome version: compatible (weakly- no qualifier checked)
+    //   the resolved Scala version and the declared scalaVersion: assume the user intended scalaHome to override anything with scalaVersion
+    def subUnmanaged(subVersion: String, jars: Seq[File]) = (sv: String) =>
+      (partialVersion(sv), partialVersion(subVersion), partialVersion(scalaVersion.value)) match {
+        case (Some(res), Some(sh), _) if res == sh     => jars
+        case (Some(res), _, Some(decl)) if res == decl => jars
+        case _                                         => Nil
+      }
+    val subScalaJars: String => Seq[File] = Defaults.unmanagedScalaInstanceOnly.value match {
+      case Some(si) => subUnmanaged(si.version, si.jars)
+      case None     => sv => if (scalaProvider.version == sv) scalaProvider.jars else Nil
+    }
+    val transform: UpdateReport => UpdateReport = r => sbt.Classpaths.substituteScalaFiles(scalaOrganization.value, r)(subScalaJars)
+    val uwConfig = (unresolvedWarningConfiguration in update).value
+    val show = Reference.display(thisProjectRef.value)
+    val st = state.value
+    val logicalClock = LogicalClock(st.hashCode)
+    val depDir = dependencyCacheDirectory.value
+    val uc0 = (updateConfiguration in task).value
+    val ms = publishMavenStyle.value
+    val cw = compatibilityWarningOptions.value
+    // Normally, log would capture log messages at all levels.
+    // Ivy logs are treated specially using sbt.UpdateConfiguration.logging.
+    // This code bumps up the sbt.UpdateConfiguration.logging to Full when logLevel is Debug.
+    import UpdateLogging.{ Full, DownloadOnly, Default }
+    val uc = (logLevel in update).?.value orElse st.get(logLevel.key) match {
+      case Some(Level.Debug) if uc0.logging == Default => uc0.copy(logging = Full)
+      case Some(x) if uc0.logging == Default => uc0.copy(logging = DownloadOnly)
+      case _ => uc0
+    }
+    val ewo =
+      if (executionRoots.value exists { _.key == evicted.key }) EvictionWarningOptions.empty
+      else (evictionWarningOptions in update).value
+    sbt.Classpaths.cachedUpdate(s.cacheDirectory / updateCacheName.value, show, ivyModule.value, uc, transform,
+      skip = (skip in update).value, force = isRoot || forceUpdateByTime, depsUpdated = depsUpdated,
+      uwConfig = uwConfig, logicalClock = logicalClock, depDir = Some(depDir),
+      ewo = ewo, mavenStyle = ms, compatWarning = cw, log = s.log)
   }
 }
diff --git a/src/main/scala-sbt-1.0/sbt/dependencygraph/DependencyGraphSbtCompat.scala b/src/main/scala-sbt-1.0/sbt/dependencygraph/DependencyGraphSbtCompat.scala
index 68887c10c..4e08319db 100644
--- a/src/main/scala-sbt-1.0/sbt/dependencygraph/DependencyGraphSbtCompat.scala
+++ b/src/main/scala-sbt-1.0/sbt/dependencygraph/DependencyGraphSbtCompat.scala
@@ -1,7 +1,64 @@
-package sbt.dependencygraph
+package sbt
+package dependencygraph
+
+import Keys._
+import Def.Initialize
+
+import CrossVersion.partialVersion
+import sbt.internal.LibraryManagement
 
 object DependencyGraphSbtCompat {
-  object Implicits {
-    implicit def convertConfig(config: sbt.Configuration): sbt.Configuration = config
+  object Implicits
+
+  // https://github.com/sbt/sbt/blob/4ce4fb72bde3b8acfaf526b79d32ca1463bc687b/main/src/main/scala/sbt/Defaults.scala#L2298 adapted
+  // to allow customization of UpdateConfiguration
+  def updateTask(task: TaskKey[_]): Initialize[Task[UpdateReport]] = Def.task {
+    val depsUpdated = transitiveUpdate.value.exists(!_.stats.cached)
+    val isRoot = executionRoots.value contains resolvedScoped.value
+    val s = streams.value
+    val scalaProvider = appConfiguration.value.provider.scalaProvider
+
+    // Only substitute unmanaged jars for managed jars when the major.minor parts of the versions the same for:
+    //   the resolved Scala version and the scalaHome version: compatible (weakly- no qualifier checked)
+    //   the resolved Scala version and the declared scalaVersion: assume the user intended scalaHome to override anything with scalaVersion
+    def subUnmanaged(subVersion: String, jars: Seq[File]) = (sv: String) ⇒
+      (partialVersion(sv), partialVersion(subVersion), partialVersion(scalaVersion.value)) match {
+        case (Some(res), Some(sh), _) if res == sh     ⇒ jars
+        case (Some(res), _, Some(decl)) if res == decl ⇒ jars
+        case _                                         ⇒ Nil
+      }
+
+    val subScalaJars: String ⇒ Seq[File] = SbtAccess.unmanagedScalaInstanceOnly.value match {
+      case Some(si) ⇒ subUnmanaged(si.version, si.allJars)
+      case None     ⇒ sv ⇒ if (scalaProvider.version == sv) scalaProvider.jars else Nil
+    }
+
+    val transform: UpdateReport ⇒ UpdateReport =
+      r ⇒ Classpaths.substituteScalaFiles(scalaOrganization.value, r)(subScalaJars)
+
+    val evictionOptions = Def.taskDyn {
+      if (executionRoots.value.exists(_.key == evicted.key))
+        Def.task(EvictionWarningOptions.empty)
+      else Def.task((evictionWarningOptions in update).value)
+    }.value
+
+    LibraryManagement.cachedUpdate(
+      // LM API
+      lm = dependencyResolution.value,
+      // Ivy-free ModuleDescriptor
+      module = ivyModule.value,
+      s.cacheStoreFactory.sub(updateCacheName.value),
+      Reference.display(thisProjectRef.value),
+      (updateConfiguration in task).value,
+      transform = transform,
+      skip = (skip in update).value,
+      force = isRoot,
+      depsUpdated = transitiveUpdate.value.exists(!_.stats.cached),
+      uwConfig = (unresolvedWarningConfiguration in update).value,
+      ewo = evictionOptions,
+      mavenStyle = publishMavenStyle.value,
+      compatWarning = compatibilityWarningOptions.value,
+      log = s.log
+    )
   }
 }
diff --git a/src/main/scala/net/virtualvoid/sbt/graph/DependencyGraphSettings.scala b/src/main/scala/net/virtualvoid/sbt/graph/DependencyGraphSettings.scala
index 9768de3e9..369c7f3dc 100644
--- a/src/main/scala/net/virtualvoid/sbt/graph/DependencyGraphSettings.scala
+++ b/src/main/scala/net/virtualvoid/sbt/graph/DependencyGraphSettings.scala
@@ -16,18 +16,18 @@
 
 package net.virtualvoid.sbt.graph
 
+import scala.language.reflectiveCalls
+
 import sbt._
 import Keys._
-import CrossVersion._
 import sbt.complete.Parser
 import org.apache.ivy.core.resolve.ResolveOptions
 import net.virtualvoid.sbt.graph.backend.{ IvyReport, SbtUpdateReport }
 import net.virtualvoid.sbt.graph.rendering.{ AsciiGraph, DagreHTML }
 import net.virtualvoid.sbt.graph.util.IOUtil
-
 import internal.librarymanagement._
 import librarymanagement._
-
+import sbt.dependencygraph.DependencyGraphSbtCompat
 import sbt.dependencygraph.DependencyGraphSbtCompat.Implicits._
 
 object DependencyGraphSettings {
@@ -37,7 +37,7 @@ object DependencyGraphSettings {
   def graphSettings = Seq(
     ivyReportFunction := ivyReportFunctionTask.value,
     updateConfiguration in ignoreMissingUpdate := updateConfiguration.value.withMissingOk(true),
-    ignoreMissingUpdate := update.value,
+    ignoreMissingUpdate := DependencyGraphSbtCompat.updateTask(ignoreMissingUpdate).value,
     filterScalaLibrary in Global := true) ++ Seq(Compile, Test, IntegrationTest, Runtime, Provided, Optional).flatMap(ivyReportForConfig)
 
   def ivyReportForConfig(config: Configuration) = inConfig(config)(Seq(
@@ -198,41 +198,4 @@ object DependencyGraphSettings {
       case _ ⇒ None
     }
   }
-
-  /**
-   * This is copied directly from sbt/main/Defaults.scala and then changed to update the UpdateConfiguration
-   * to ignore missing artifacts.
-   */
-  /*def ignoreMissingUpdateT =
-    ignoreMissingUpdate := {
-      // FIXME: remove busywork
-
-      val scalaVersion = Keys.scalaVersion.value
-      val unmanagedScalaInstanceOnly = SbtAccess.unmanagedScalaInstanceOnly.value
-      val scalaOrganization = Keys.scalaOrganization.value
-
-      val depsUpdated = transitiveUpdate.value.exists(!_.stats.cached)
-      val isRoot = executionRoots.value contains resolvedScoped.value
-      val s = streams.value
-      val scalaProvider = appConfiguration.value.provider.scalaProvider
-
-      // Only substitute unmanaged jars for managed jars when the major.minor parts of the versions the same for:
-      //   the resolved Scala version and the scalaHome version: compatible (weakly- no qualifier checked)
-      //   the resolved Scala version and the declared scalaVersion: assume the user intended scalaHome to override anything with scalaVersion
-      def subUnmanaged(subVersion: String, jars: Seq[File]) = (sv: String) ⇒
-        (partialVersion(sv), partialVersion(subVersion), partialVersion(scalaVersion)) match {
-          case (Some(res), Some(sh), _) if res == sh     ⇒ jars
-          case (Some(res), _, Some(decl)) if res == decl ⇒ jars
-          case _                                         ⇒ Nil
-        }
-      val subScalaJars: String ⇒ Seq[File] = unmanagedScalaInstanceOnly match {
-        case Some(si) ⇒ subUnmanaged(si.version, si.allJars)
-        case None     ⇒ sv ⇒ if (scalaProvider.version == sv) scalaProvider.jars else Nil
-      }
-      val transform: UpdateReport ⇒ UpdateReport = r ⇒ Classpaths.substituteScalaFiles(scalaOrganization, r)(subScalaJars)
-
-      val show = Reference.display(thisProjectRef.value)
-      SbtAccess.cachedUpdater(
-        s.cacheDirectory, show, ivyModule.value, (updateConfiguration in ignoreMissingUpdate).value, transform, skip = (skip in update).value, force = isRoot, depsUpdated = depsUpdated, log = s.log)
-    }*/
 }