diff --git a/LICENSE.txt b/LICENSE.txt
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/LICENSE.txt
@@ -0,0 +1,202 @@
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diff --git a/README.md b/README.md
index 338c556..b68cbd7 100644
--- a/README.md
+++ b/README.md
@@ -2,10 +2,17 @@
 
 ## Documentation
 
-Please refer to http://predictionio.incubator.apache.org/templates/similarproduct/quickstart/
+Please refer to
+http://predictionio.incubator.apache.org/templates/similarproduct/quickstart/
 
 ## Versions
 
+### v0.12.0-incubating
+
+- Bump version number to track PredictionIO version
+- Sets default build targets according to PredictionIO
+- Fix warnings and use of case class
+
 ### v0.11.0-incubating
 
 - Bump version number to track PredictionIO version
diff --git a/build.sbt b/build.sbt
index 4e22d10..cda3ca1 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,11 +1,10 @@
 name := "template-scala-parallel-similarproduct"
 
 parallelExecution in Test := false
-
 test in assembly := {}
 
+scalaVersion := "2.11.8"
 libraryDependencies ++= Seq(
-  "org.apache.predictionio" %% "apache-predictionio-core" % "0.11.0-incubating" % "provided",
-  "org.apache.spark"        %% "spark-core"               % "1.3.0" % "provided",
-  "org.apache.spark"        %% "spark-mllib"              % "1.3.0" % "provided",
-  "org.scalatest"           %% "scalatest"                % "2.2.1" % "test")
+  "org.apache.predictionio" %% "apache-predictionio-core" % "0.12.0-incubating" % "provided",
+  "org.apache.spark"        %% "spark-mllib"              % "2.1.1" % "provided",
+  "org.scalatest"           %% "scalatest"                % "3.0.4" % "test")
diff --git a/data/import_eventserver.py b/data/import_eventserver.py
index 452358d..da5a604 100644
--- a/data/import_eventserver.py
+++ b/data/import_eventserver.py
@@ -11,13 +11,13 @@
 def import_events(client):
   random.seed(SEED)
   count = 0
-  print client.get_status()
-  print "Importing data..."
+  print(client.get_status())
+  print("Importing data...")
 
   # generate 10 users, with user ids u1,u2,....,u10
   user_ids = ["u%s" % i for i in range(1, 11)]
   for user_id in user_ids:
-    print "Set user", user_id
+    print("Set user", user_id)
     client.create_event(
       event="$set",
       entity_type="user",
@@ -30,7 +30,7 @@
   categories = ["c%s" % i for i in range(1, 7)]
   item_ids = ["i%s" % i for i in range(1, 51)]
   for item_id in item_ids:
-    print "Set item", item_id
+    print("Set item", item_id)
     client.create_event(
       event="$set",
       entity_type="item",
@@ -44,7 +44,7 @@
   # each user randomly viewed 10 items
   for user_id in user_ids:
     for viewed_item in random.sample(item_ids, 10):
-      print "User", user_id ,"views item", viewed_item
+      print("User", user_id ,"views item", viewed_item)
       client.create_event(
         event="view",
         entity_type="user",
@@ -54,7 +54,7 @@
       )
       count += 1
 
-  print "%s events are imported." % count
+  print("%s events are imported." % count)
 
 if __name__ == '__main__':
   parser = argparse.ArgumentParser(
@@ -63,7 +63,7 @@
   parser.add_argument('--url', default="http://localhost:7070")
 
   args = parser.parse_args()
-  print args
+  print(args)
 
   client = predictionio.EventClient(
     access_key=args.access_key,
diff --git a/data/send_query.py b/data/send_query.py
index f6d9c61..145d107 100644
--- a/data/send_query.py
+++ b/data/send_query.py
@@ -4,4 +4,4 @@
 
 import predictionio
 engine_client = predictionio.EngineClient(url="http://localhost:8000")
-print engine_client.send_query({"items": ["i1", "i3"], "num": 4})
+print(engine_client.send_query({"items": ["i1", "i3"], "num": 4}))
diff --git a/project/assembly.sbt b/project/assembly.sbt
index e17409e..15a88b0 100644
--- a/project/assembly.sbt
+++ b/project/assembly.sbt
@@ -1 +1 @@
-addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.4")
+addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.5")
diff --git a/project/build.properties b/project/build.properties
index 64317fd..c091b86 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=0.13.15
+sbt.version=0.13.16
diff --git a/src/main/scala/ALSAlgorithm.scala b/src/main/scala/ALSAlgorithm.scala
index 7cdf6e9..3c48561 100644
--- a/src/main/scala/ALSAlgorithm.scala
+++ b/src/main/scala/ALSAlgorithm.scala
@@ -5,7 +5,6 @@
 import org.apache.predictionio.data.storage.BiMap
 
 import org.apache.spark.SparkContext
-import org.apache.spark.SparkContext._
 import org.apache.spark.mllib.recommendation.ALS
 import org.apache.spark.mllib.recommendation.{Rating => MLlibRating}
 
@@ -168,13 +167,13 @@
     val topScores = getTopN(filteredScore, query.num)(ord).toArray
 
     val itemScores = topScores.map { case (i, s) =>
-      new ItemScore(
+      ItemScore(
         item = model.itemIntStringMap(i),
         score = s
       )
     }
 
-    new PredictedResult(itemScores)
+    PredictedResult(itemScores)
   }
 
   private
diff --git a/src/main/scala/CooccurrenceAlgorithm.scala b/src/main/scala/CooccurrenceAlgorithm.scala
index b56ecec..c6e0e08 100644
--- a/src/main/scala/CooccurrenceAlgorithm.scala
+++ b/src/main/scala/CooccurrenceAlgorithm.scala
@@ -129,7 +129,7 @@
         )
       }
 
-    new PredictedResult(itemScores)
+    PredictedResult(itemScores)
 
   }
 
diff --git a/src/main/scala/DataSource.scala b/src/main/scala/DataSource.scala
index 870771b..97bf4b4 100644
--- a/src/main/scala/DataSource.scala
+++ b/src/main/scala/DataSource.scala
@@ -4,11 +4,9 @@
 import org.apache.predictionio.controller.EmptyEvaluationInfo
 import org.apache.predictionio.controller.EmptyActualResult
 import org.apache.predictionio.controller.Params
-import org.apache.predictionio.data.storage.Event
 import org.apache.predictionio.data.store.PEventStore
 
 import org.apache.spark.SparkContext
-import org.apache.spark.SparkContext._
 import org.apache.spark.rdd.RDD
 
 import grizzled.slf4j.Logger
diff --git a/src/main/scala/Engine.scala b/src/main/scala/Engine.scala
index ac587d7..df1e007 100644
--- a/src/main/scala/Engine.scala
+++ b/src/main/scala/Engine.scala
@@ -1,6 +1,6 @@
 package org.example.similarproduct
 
-import org.apache.predictionio.controller.IEngineFactory
+import org.apache.predictionio.controller.EngineFactory
 import org.apache.predictionio.controller.Engine
 
 case class Query(
@@ -10,20 +10,20 @@
   categoryBlackList: Option[Set[String]],
   whiteList: Option[Set[String]],
   blackList: Option[Set[String]]
-) extends Serializable
+)
 
 case class PredictedResult(
   itemScores: Array[ItemScore]
-) extends Serializable {
+){
   override def toString: String = itemScores.mkString(",")
 }
 
 case class ItemScore(
   item: String,
   score: Double
-) extends Serializable
+)
 
-object SimilarProductEngine extends IEngineFactory {
+object SimilarProductEngine extends EngineFactory {
   def apply() = {
     new Engine(
       classOf[DataSource],
diff --git a/src/main/scala/Preparator.scala b/src/main/scala/Preparator.scala
index f5fe1c1..8c005f1 100644
--- a/src/main/scala/Preparator.scala
+++ b/src/main/scala/Preparator.scala
@@ -3,7 +3,6 @@
 import org.apache.predictionio.controller.PPreparator
 
 import org.apache.spark.SparkContext
-import org.apache.spark.SparkContext._
 import org.apache.spark.rdd.RDD
 
 class Preparator
diff --git a/src/test/scala/CooccurenceAlgorithmTest.scala b/src/test/scala/CooccurenceAlgorithmTest.scala
index dcddb73..287b227 100644
--- a/src/test/scala/CooccurenceAlgorithmTest.scala
+++ b/src/test/scala/CooccurenceAlgorithmTest.scala
@@ -109,6 +109,7 @@
       items = List("i1"),
       num = 10,
       categories = None,
+      categoryBlackList = None,
       whiteList = None,
       blackList = None
     )
@@ -131,6 +132,7 @@
       items = List("i1", "i2"),
       num = 10,
       categories = None,
+      categoryBlackList = None,
       whiteList = None,
       blackList = None
     )