diff --git a/.travis.yml b/.travis.yml
index a040c85..261b80f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,9 +5,9 @@ jdk:
   - oraclejdk8
 
 scala:
-  - 2.11.8
+  - 2.11.12
 
-script: sbt ++$TRAVIS_SCALA_VERSION clean test
+script: sbt ++$TRAVIS_SCALA_VERSION clean coverageTest
 
 cache:
   directories:
@@ -15,7 +15,7 @@ cache:
   - $HOME/.sbt/boot/
   - $HOME/.zinc
 
-after_success: sbt ++$TRAVIS_SCALA_VERSION travis-report
+after_success: sbt ++$TRAVIS_SCALA_VERSION travisReport
 
 before_cache:
   # Tricks to avoid unnecessary cache updates
diff --git a/build.sbt b/build.sbt
index fcf8800..c055593 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,4 +1,4 @@
-organization := "org.hammerlab.genomics"
+group("org.hammerlab.genomics")
 name := "loci"
 
 github.repo("genomic-loci")
@@ -7,13 +7,13 @@ addSparkDeps
 
 dep(
   args4j,
-  args4s       % "1.3.0",
+  args4s       % "1.3.1",
   htsjdk,
   iterators    % "2.0.0",
   paths        % "1.4.0",
-  reference    % "1.4.1" + testtest,
+  reference    % "1.4.2" + testtest,
   scalautils,
-  spark_util   % "2.0.1",
+  spark_util   % "2.0.2",
   string_utils % "1.2.0"
 )
 
diff --git a/project/build.properties b/project/build.properties
index 394cb75..8b697bb 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.0.4
+sbt.version=1.1.0
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 9dc0442..0003a9d 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1 +1 @@
-addSbtPlugin("org.hammerlab.sbt" % "base" % "4.1.0")
+addSbtPlugin("org.hammerlab.sbt" % "base" % "4.2.0")
diff --git a/src/main/scala/org/hammerlab/genomics/loci/set/Serializer.scala b/src/main/scala/org/hammerlab/genomics/loci/set/Serializer.scala
deleted file mode 100644
index c79056c..0000000
--- a/src/main/scala/org/hammerlab/genomics/loci/set/Serializer.scala
+++ /dev/null
@@ -1,5 +0,0 @@
-package org.hammerlab.genomics.loci.set
-
-import com.esotericsoftware.kryo.io.{ Input, Output }
-import com.esotericsoftware.kryo.{ Kryo, Serializer ⇒ KryoSerializer }
-