diff --git a/bin/compute-classpath.cmd b/bin/compute-classpath.cmd
index cf38188c4b255e793d4b149d2adecf0b23c4eab5..9e3e10ecaad982f8a64a510168f2340ab3b07020 100644
--- a/bin/compute-classpath.cmd
+++ b/bin/compute-classpath.cmd
@@ -20,7 +20,7 @@ rem
 rem This script computes Spark's classpath and prints it to stdout; it's used by both the "run"
 rem script and the ExecutorRunner in standalone cluster mode.
 
-set SCALA_VERSION=2.9.3
+set SCALA_VERSION=2.10
 
 rem Figure out where the Spark framework is installed
 set FWDIR=%~dp0..\
diff --git a/core/pom.xml b/core/pom.xml
index 382473a3b3dcfca3b6bd31c0e555cabbc53af1b9..d42c2ee2fdb66d9bbc8cbac253f704da1e3ab113 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -83,7 +83,7 @@
     </dependency>
     <dependency>
       <groupId>com.twitter</groupId>
-      <artifactId>chill_2.9.3</artifactId>
+      <artifactId>chill_2.10</artifactId>
       <version>0.3.1</version>
     </dependency>
     <dependency>
diff --git a/docs/_config.yml b/docs/_config.yml
index 5c135a024215b0bfc697a938a592f7518f121428..e7a96c0c7079bbb61c006c273e7010a491812a28 100644
--- a/docs/_config.yml
+++ b/docs/_config.yml
@@ -5,6 +5,6 @@ markdown: kramdown
 # of Spark, Scala, and Mesos.
 SPARK_VERSION: 0.8.0-SNAPSHOT
 SPARK_VERSION_SHORT: 0.8.0
-SCALA_VERSION: 2.9.3
+SCALA_VERSION: 2.10
 MESOS_VERSION: 0.9.0-incubating
 SPARK_ISSUE_TRACKER_URL: https://spark-project.atlassian.net
diff --git a/docs/_plugins/copy_api_dirs.rb b/docs/_plugins/copy_api_dirs.rb
index c574ea7f5cd22344df490abf3199f64dbe4f9731..431de909cbf4b0807ac772cc69a6b62c0330bf8a 100644
--- a/docs/_plugins/copy_api_dirs.rb
+++ b/docs/_plugins/copy_api_dirs.rb
@@ -35,7 +35,7 @@ if not (ENV['SKIP_API'] == '1' or ENV['SKIP_SCALADOC'] == '1')
   # Copy over the scaladoc from each project into the docs directory.
   # This directory will be copied over to _site when `jekyll` command is run.
   projects.each do |project_name|
-    source = "../" + project_name + "/target/scala-2.9.3/api"
+    source = "../" + project_name + "/target/scala-2.10/api"
     dest = "api/" + project_name
 
     puts "echo making directory " + dest
diff --git a/pom.xml b/pom.xml
index 011f6e90069cabb68e71be7a62745cdc8b0695b4..cd4593388f16331408ec36e3f6a52bd98bb18e6d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -76,17 +76,9 @@
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 
     <java.version>1.5</java.version>
-<<<<<<< HEAD
     <scala.version>2.10</scala.version>
     <mesos.version>0.9.0-incubating</mesos.version>
     <akka.version>2.1.4</akka.version>
-    <spray.version>1.1-M7</spray.version>
-    <spray.json.version>1.2.3</spray.json.version>
-=======
-    <scala.version>2.9.3</scala.version>
-    <mesos.version>0.12.1</mesos.version>
-    <akka.version>2.0.5</akka.version>
->>>>>>> master
     <slf4j.version>1.7.2</slf4j.version>
     <log4j.version>1.2.17</log4j.version>
     <hadoop.version>1.0.4</hadoop.version>
diff --git a/pyspark b/pyspark
index 4941a36d0df00568f1a9fd70e133a6d8b87cbe59..69d49eb87c87a7c0fe2b74ffd17189d32bcd4258 100755
--- a/pyspark
+++ b/pyspark
@@ -23,7 +23,7 @@ FWDIR="$(cd `dirname $0`; pwd)"
 # Export this as SPARK_HOME
 export SPARK_HOME="$FWDIR"
 
-SCALA_VERSION=2.9.3
+SCALA_VERSION=2.10
 
 # Exit if the user hasn't compiled Spark
 if [ ! -f "$FWDIR/RELEASE" ]; then
diff --git a/pyspark2.cmd b/pyspark2.cmd
index f58e34964393b359614cdf71e45665a8ed36ba42..21f9a3438878ad8e99b062ee2ee171b1bb587dbb 100644
--- a/pyspark2.cmd
+++ b/pyspark2.cmd
@@ -17,7 +17,7 @@ rem See the License for the specific language governing permissions and
 rem limitations under the License.
 rem
 
-set SCALA_VERSION=2.9.3
+set SCALA_VERSION=2.10
 
 rem Figure out where the Spark framework is installed
 set FWDIR=%~dp0
diff --git a/repl-bin/src/deb/bin/run b/repl-bin/src/deb/bin/run
index 8b5d8300f2e2cd78b65fa74b9ede85354f1c6121..47bb654baf44784565dc6130e0f0b534ff24c905 100755
--- a/repl-bin/src/deb/bin/run
+++ b/repl-bin/src/deb/bin/run
@@ -17,7 +17,7 @@
 # limitations under the License.
 #
 
-SCALA_VERSION=2.9.3
+SCALA_VERSION=2.10
 
 # Figure out where the Scala framework is installed
 FWDIR="$(cd `dirname $0`; pwd)"
diff --git a/run-example b/run-example
index 08ec717ca51a51bbfe42823df00a2ea5a17af287..feade6589a5c0dff6eb1850d08428a64b81ebcca 100755
--- a/run-example
+++ b/run-example
@@ -17,7 +17,7 @@
 # limitations under the License.
 #
 
-SCALA_VERSION=2.9.3
+SCALA_VERSION=2.10
 
 # Figure out where the Scala framework is installed
 FWDIR="$(cd `dirname $0`; pwd)"
diff --git a/run-example2.cmd b/run-example2.cmd
index dbb371ecfc21e2f27aecd9bebef5713970f47b0f..d4ad98d6e7ba85510ddec713e6d89f51073a4ab9 100644
--- a/run-example2.cmd
+++ b/run-example2.cmd
@@ -17,7 +17,7 @@ rem See the License for the specific language governing permissions and
 rem limitations under the License.
 rem
 
-set SCALA_VERSION=2.9.3
+set SCALA_VERSION=2.10
 
 rem Figure out where the Spark framework is installed
 set FWDIR=%~dp0