diff --git a/LICENSE.txt b/LICENSE.txt
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/LICENSE.txt
@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/README.md b/README.md
index 98bfe1f..4ec0031 100644
--- a/README.md
+++ b/README.md
@@ -2,10 +2,17 @@
 
 ## Documentation
 
-Please refer to http://predictionio.incubator.apache.org/templates/ecommercerecommendation/quickstart/
+Please refer to
+http://predictionio.incubator.apache.org/templates/ecommercerecommendation/quickstart/
 
 ## Versions
 
+### v0.12.0-incubating
+
+- Bump version number to track PredictionIO version
+- Sets default build targets according to PredictionIO
+- Fix warnings
+
 ### v0.11.0-incubating
 
 - Bump version number to track PredictionIO version
diff --git a/build.sbt b/build.sbt
index f8f8e51..6b5b95a 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,9 +1,10 @@
 name := "template-scala-parallel-ecommercerecommendation"
 
 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 5c49837..e8010ca 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",
@@ -55,7 +55,7 @@
       count += 1
       # randomly buy some of the viewed items
       if random.choice([True, False]):
-        print "User", user_id ,"buys item", viewed_item
+        print("User", user_id ,"buys item", viewed_item)
         client.create_event(
           event="buy",
           entity_type="user",
@@ -65,7 +65,7 @@
         )
         count += 1
 
-  print "%s events are imported." % count
+  print("%s events are imported." % count)
 
 if __name__ == '__main__':
   parser = argparse.ArgumentParser(
@@ -74,7 +74,7 @@
   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 b0eb651..df7f624 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({"user": "u1", "num": 4})
+print(engine_client.send_query({"user": "u1", "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/DataSource.scala b/src/main/scala/DataSource.scala
index 4e71c2b..9fee0bf 100644
--- a/src/main/scala/DataSource.scala
+++ b/src/main/scala/DataSource.scala
@@ -8,7 +8,6 @@
 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/ECommAlgorithm.scala b/src/main/scala/ECommAlgorithm.scala
index 3542bd3..f812619 100644
--- a/src/main/scala/ECommAlgorithm.scala
+++ b/src/main/scala/ECommAlgorithm.scala
@@ -7,7 +7,6 @@
 import org.apache.predictionio.data.store.LEventStore
 
 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}
 import org.apache.spark.rdd.RDD
@@ -16,7 +15,6 @@
 
 import scala.collection.mutable.PriorityQueue
 import scala.concurrent.duration.Duration
-import scala.concurrent.ExecutionContext.Implicits.global
 
 case class ECommAlgorithmParams(
   appName: String,
@@ -320,7 +318,7 @@
         try {
           event.targetEntityId.get
         } catch {
-          case e => {
+          case e: Exception => {
             logger.error(s"Can't get targetEntityId of event ${event}.")
             throw e
           }
@@ -391,7 +389,7 @@
       try {
         event.targetEntityId.get
       } catch {
-        case e => {
+        case e: Exception => {
           logger.error("Can't get targetEntityId of event ${event}.")
           throw e
         }
diff --git a/src/main/scala/Engine.scala b/src/main/scala/Engine.scala
index 7777b31..b527bca 100644
--- a/src/main/scala/Engine.scala
+++ b/src/main/scala/Engine.scala
@@ -1,6 +1,6 @@
 package org.example.ecommercerecommendation
 
-import org.apache.predictionio.controller.IEngineFactory
+import org.apache.predictionio.controller.EngineFactory
 import org.apache.predictionio.controller.Engine
 
 case class Query(
@@ -20,7 +20,7 @@
   score: Double
 ) extends Serializable
 
-object ECommerceRecommendationEngine extends IEngineFactory {
+object ECommerceRecommendationEngine extends EngineFactory {
   def apply() = {
     new Engine(
       classOf[DataSource],
diff --git a/src/main/scala/Preparator.scala b/src/main/scala/Preparator.scala
index 1f781b1..3878ef3 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/ECommAlgorithmTest.scala b/src/test/scala/ECommAlgorithmTest.scala
index 769bf98..98e22d9 100644
--- a/src/test/scala/ECommAlgorithmTest.scala
+++ b/src/test/scala/ECommAlgorithmTest.scala
@@ -166,7 +166,7 @@
 
     top(0)._1 should be (expected(0)._1)
     top(1)._1 should be (expected(1)._1)
-    top(0)._2 should be (expected(0)._2 plusOrMinus 0.001)
-    top(1)._2 should be (expected(1)._2 plusOrMinus 0.001)
+    top(0)._2 should be (expected(0)._2 +- 0.001)
+    top(1)._2 should be (expected(1)._2 +- 0.001)
   }
 }