diff --git a/.travis.yml b/.travis.yml
index a56498a..b854eed 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,17 +1,13 @@
 language: scala
 scala:
-- 2.10.6
-- 2.11.8
-- 2.12.0
+- 2.10.7
+- 2.11.12
+- 2.12.6
+- 2.13.0-M5
 jdk:
 - oraclejdk8
-- openjdk7
-matrix:
-  exclude:
-    - scala: 2.12.0
-      jdk: openjdk7
 script:
-- sbt ++$TRAVIS_SCALA_VERSION "test-only -- --truncate=999999"
+- sbt ++$TRAVIS_SCALA_VERSION "testOnly -- --truncate=999999"
 # Tricks to avoid unnecessary cache updates, from
 # http://www.scala-sbt.org/0.13/docs/Travis-CI-with-sbt.html
 - find $HOME/.sbt -name "*.lock" | xargs rm
diff --git a/build.sbt b/build.sbt
index 3fd0f8e..28015d0 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,49 +1,48 @@
-
 organization  := "com.lihaoyi"
 
 name := "acyclic"
 
-version := "0.1.7"
-
-scalaVersion  := "2.11.8"
-
-crossScalaVersions := Seq("2.10.6", "2.11.8", "2.12.0")
+version := "0.1.8"
 
 resolvers += Resolver.sonatypeRepo("releases")
 
 libraryDependencies ++= Seq(
-  "com.lihaoyi" %% "utest" % "0.4.4" % "test",
+  "com.lihaoyi" %% "utest" % "0.6.6" % "test",
   "org.scala-lang" % "scala-compiler" % scalaVersion.value % "provided"
 )
 
+unmanagedSourceDirectories.in(Compile) ++= {
+  CrossVersion.partialVersion(scalaBinaryVersion.value) match {
+    case Some((2, n)) if n == 10 || n == 11 || n == 12 =>
+      Seq(baseDirectory.value / "src" / "main" / "scala-2.10_2.12")
+    case Some((2, 13)) =>
+      Seq(baseDirectory.value / "src" / "main" / "scala-2.13")
+    case _ =>
+      Nil
+  }
+}
+
 testFrameworks += new TestFramework("utest.runner.Framework")
 
-unmanagedSourceDirectories in Test <+= baseDirectory(_ / "src" / "test" / "resources")
+unmanagedSourceDirectories in Test += baseDirectory.value / "src" / "test" / "resources"
 
 // Sonatype
 publishArtifact in Test := false
 
-publishTo <<= version { (v: String) =>
-  Some("releases"  at "https://oss.sonatype.org/service/local/staging/deploy/maven2")
-}
+publishTo := Some("releases" at "https://oss.sonatype.org/service/local/staging/deploy/maven2")
+
+scmInfo := Some(ScmInfo(
+  browseUrl = url("https://github.com/lihaoyi/acyclic"),
+  connection = "scm:git:git@github.com:lihaoyi/acyclic.git"
+))
+
+licenses := Seq("MIT" -> url("http://www.opensource.org/licenses/mit-license.html"))
+
+homepage := Some(url("https://github.com/lihaoyi/acyclic"))
 
-pomExtra := (
-  <url>https://github.com/lihaoyi/acyclic</url>
-    <licenses>
-      <license>
-        <name>MIT license</name>
-        <url>http://www.opensource.org/licenses/mit-license.php</url>
-      </license>
-    </licenses>
-    <scm>
-      <url>git://github.com/lihaoyi/utest.git</url>
-      <connection>scm:git://github.com/lihaoyi/acyclic.git</connection>
-    </scm>
-    <developers>
-      <developer>
-        <id>lihaoyi</id>
-        <name>Li Haoyi</name>
-        <url>https://github.com/lihaoyi</url>
-      </developer>
-    </developers>
-  )
+developers += Developer(
+  email = "haoyi.sg@gmail.com",
+  id = "lihaoyi",
+  name = "Li Haoyi",
+  url = url("https://github.com/lihaoyi")
+)
\ No newline at end of file
diff --git a/project/build.properties b/project/build.properties
index 817bc38..0cd8b07 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=0.13.9
+sbt.version=1.2.3
diff --git a/project/build.sbt b/project/build.sbt
index 7a1f37d..1d9667a 100644
--- a/project/build.sbt
+++ b/project/build.sbt
@@ -1,2 +1,3 @@
 
-addSbtPlugin("com.jsuereth" % "sbt-pgp" % "1.0.0")
\ No newline at end of file
+addSbtPlugin("com.jsuereth" % "sbt-pgp" % "1.1.1")
+addSbtPlugin("com.dwijnand" % "sbt-travisci" % "1.1.3")
diff --git a/src/main/scala-2.10_2.12/acyclic/plugin/Compat.scala b/src/main/scala-2.10_2.12/acyclic/plugin/Compat.scala
new file mode 100644
index 0000000..b421a78
--- /dev/null
+++ b/src/main/scala-2.10_2.12/acyclic/plugin/Compat.scala
@@ -0,0 +1,24 @@
+package acyclic.plugin
+
+import acyclic.file
+
+import scala.collection.{SortedSet, SortedSetLike}
+import scala.collection.mutable.Builder
+import scala.collection.generic.{CanBuildFrom, SortedSetFactory}
+import scala.language.implicitConversions
+
+object Compat {
+
+  // from https://github.com/scala/scala-collection-compat/blob/746a7de28223812b19d0d9f68d2253e0c5f655ca/compat/src/main/scala-2.11_2.12/scala/collection/compat/CompatImpl.scala#L8-L11
+  private def simpleCBF[A, C](f: => Builder[A, C]): CanBuildFrom[Any, A, C] = new CanBuildFrom[Any, A, C] {
+    def apply(from: Any): Builder[A, C] = apply()
+    def apply(): Builder[A, C]          = f
+  }
+
+  // from https://github.com/scala/scala-collection-compat/blob/746a7de28223812b19d0d9f68d2253e0c5f655ca/compat/src/main/scala-2.11_2.12/scala/collection/compat/PackageShared.scala#L46-L49
+  implicit def sortedSetCompanionToCBF[A: Ordering,
+                                       CC[X] <: SortedSet[X] with SortedSetLike[X, CC[X]]](
+      fact: SortedSetFactory[CC]): CanBuildFrom[Any, A, CC[A]] =
+    simpleCBF(fact.newBuilder[A])
+
+}
\ No newline at end of file
diff --git a/src/main/scala-2.13/acyclic/plugin/Compat.scala b/src/main/scala-2.13/acyclic/plugin/Compat.scala
new file mode 100644
index 0000000..e195a41
--- /dev/null
+++ b/src/main/scala-2.13/acyclic/plugin/Compat.scala
@@ -0,0 +1,5 @@
+package acyclic.plugin
+
+import acyclic.file
+
+object Compat
diff --git a/src/main/scala/acyclic/plugin/GraphAnalysis.scala b/src/main/scala/acyclic/plugin/GraphAnalysis.scala
index bf72ce3..b405cf0 100644
--- a/src/main/scala/acyclic/plugin/GraphAnalysis.scala
+++ b/src/main/scala/acyclic/plugin/GraphAnalysis.scala
@@ -48,7 +48,7 @@ trait GraphAnalysis{
                            .filter(!distances.contains(_))
 
         children.foreach(distances(_) = distances(next) + 1)
-        queue.enqueue(children.toSeq:_*)
+        queue ++= children
       }
       var route = List(from)
       while(route.length == 1 || route.head != from){
diff --git a/src/main/scala/acyclic/plugin/PluginPhase.scala b/src/main/scala/acyclic/plugin/PluginPhase.scala
index eaee91a..4e8adbc 100644
--- a/src/main/scala/acyclic/plugin/PluginPhase.scala
+++ b/src/main/scala/acyclic/plugin/PluginPhase.scala
@@ -1,6 +1,7 @@
 
 package acyclic.plugin
 import acyclic.file
+import acyclic.plugin.Compat._
 import scala.collection.{SortedSet, mutable}
 import scala.tools.nsc.{Global, Phase}
 import tools.nsc.plugins.PluginComponent
@@ -94,6 +95,7 @@ class PluginPhase(val global: Global,
           Value.File(unit.source.path, pkgName(unit)),
           connections.groupBy(c => Value.File(c._1, pkgName(unitMap(c._1))): Value)
                      .mapValues(_.map(_._2))
+                     .toMap
         )
       }
 
@@ -112,6 +114,7 @@ class PluginPhase(val global: Global,
                .flatMap(_.dependencies.toSeq)
                .groupBy(_._1)
                .mapValues(_.flatMap(_._2))
+               .toMap
         )
       }
 
@@ -142,7 +145,7 @@ class PluginPhase(val global: Global,
                                .map{ case Seq(a, b) => (a.value, a.dependencies(b.value))}
                                .toSeq
         cycleReporter(
-          cycleInfo.map{ case (a, b) => a -> b.map(_.pos.line).to[SortedSet]}
+          cycleInfo.map{ case (a, b) => a -> b.map(_.pos.line).to(SortedSet)}
         )
 
         global.error("Unwanted cyclic dependency")