diff --git a/core/pom.xml b/core/pom.xml
index eb6cc4d3105e9..e4c32eff0cd77 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -150,7 +150,7 @@
       <artifactId>json4s-jackson_${scala.binary.version}</artifactId>
       <version>3.2.6</version>
       <!-- see also exclusion for lift-json; this is necessary since it depends on
-         scala-library and scalap 2.10.0, but we use 2.10.3, and only override
+         scala-library and scalap 2.10.0, but we use 2.10.4, and only override
          scala-library -->
       <exclusions>
         <exclusion>
diff --git a/dev/audit-release/README.md b/dev/audit-release/README.md
index 2437a98672177..38becda0eae92 100644
--- a/dev/audit-release/README.md
+++ b/dev/audit-release/README.md
@@ -4,7 +4,7 @@ run them locally by setting appropriate environment variables.
 
 ```
 $ cd sbt_app_core
-$ SCALA_VERSION=2.10.3 \
+$ SCALA_VERSION=2.10.4 \
   SPARK_VERSION=1.0.0-SNAPSHOT \
   SPARK_RELEASE_REPOSITORY=file:///home/patrick/.ivy2/local \
   sbt run
diff --git a/dev/audit-release/audit_release.py b/dev/audit-release/audit_release.py
index 52c367d9b030d..fa2f02dfecc75 100755
--- a/dev/audit-release/audit_release.py
+++ b/dev/audit-release/audit_release.py
@@ -35,7 +35,7 @@
 RELEASE_KEY = "9E4FE3AF"
 RELEASE_REPOSITORY = "https://repository.apache.org/content/repositories/orgapachespark-1006/"
 RELEASE_VERSION = "1.0.0"
-SCALA_VERSION = "2.10.3"
+SCALA_VERSION = "2.10.4"
 SCALA_BINARY_VERSION = "2.10"
 ##
 
diff --git a/docker/spark-test/base/Dockerfile b/docker/spark-test/base/Dockerfile
index e543db6143e4d..5956d59130fbf 100644
--- a/docker/spark-test/base/Dockerfile
+++ b/docker/spark-test/base/Dockerfile
@@ -25,7 +25,7 @@ RUN apt-get update
 # install a few other useful packages plus Open Jdk 7
 RUN apt-get install -y less openjdk-7-jre-headless net-tools vim-tiny sudo openssh-server
 
-ENV SCALA_VERSION 2.10.3
+ENV SCALA_VERSION 2.10.4
 ENV CDH_VERSION cdh4
 ENV SCALA_HOME /opt/scala-$SCALA_VERSION
 ENV SPARK_HOME /opt/spark
diff --git a/docs/_config.yml b/docs/_config.yml
index aa5a5adbc1743..d585b8c5ea763 100644
--- a/docs/_config.yml
+++ b/docs/_config.yml
@@ -6,7 +6,7 @@ markdown: kramdown
 SPARK_VERSION: 1.0.0-SNAPSHOT
 SPARK_VERSION_SHORT: 1.0.0
 SCALA_BINARY_VERSION: "2.10"
-SCALA_VERSION: "2.10.3"
+SCALA_VERSION: "2.10.4"
 MESOS_VERSION: 0.13.0
 SPARK_ISSUE_TRACKER_URL: https://spark-project.atlassian.net
 SPARK_GITHUB_URL: https://github.com/apache/spark
diff --git a/pom.xml b/pom.xml
index 72acf2b402703..8501cfd12db34 100644
--- a/pom.xml
+++ b/pom.xml
@@ -110,7 +110,7 @@
 
     <java.version>1.6</java.version>
 
-    <scala.version>2.10.3</scala.version>
+    <scala.version>2.10.4</scala.version>
     <scala.binary.version>2.10</scala.binary.version>
     <mesos.version>0.13.0</mesos.version>
     <akka.group>org.spark-project.akka</akka.group>
@@ -380,7 +380,7 @@
         <artifactId>lift-json_${scala.binary.version}</artifactId>
         <version>2.5.1</version>
         <!-- see also exclusion for json4s; this is necessary since it depends on
-             scala-library and scalap 2.10.0, but we use 2.10.3, and only override
+             scala-library and scalap 2.10.0, but we use 2.10.4, and only override
              scala-library -->
         <exclusions>
           <exclusion>
diff --git a/project/SparkBuild.scala b/project/SparkBuild.scala
index 2549bc9710f1f..8c8cd79f26b55 100644
--- a/project/SparkBuild.scala
+++ b/project/SparkBuild.scala
@@ -152,7 +152,7 @@ object SparkBuild extends Build {
   def sharedSettings = Defaults.defaultSettings ++ MimaBuild.mimaSettings(file(sparkHome)) ++ Seq(
     organization       := "org.apache.spark",
     version            := SPARK_VERSION,
-    scalaVersion       := "2.10.3",
+    scalaVersion       := "2.10.4",
     scalacOptions := Seq("-Xmax-classfile-name", "120", "-unchecked", "-deprecation",
       "-target:" + SCALAC_JVM_VERSION),
     javacOptions := Seq("-target", JAVAC_JVM_VERSION, "-source", JAVAC_JVM_VERSION),
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 5aa8a1ec2409b..d787237ddc540 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,4 +1,4 @@
-scalaVersion := "2.10.3"
+scalaVersion := "2.10.4"
 
 resolvers += Resolver.url("artifactory", url("http://scalasbt.artifactoryonline.com/scalasbt/sbt-plugin-releases"))(Resolver.ivyStylePatterns)
 
diff --git a/project/project/SparkPluginBuild.scala b/project/project/SparkPluginBuild.scala
index 43361aa2b4c41..3437fecca79d9 100644
--- a/project/project/SparkPluginBuild.scala
+++ b/project/project/SparkPluginBuild.scala
@@ -32,7 +32,7 @@ object SparkPluginDef extends Build {
     name                 :=  "spark-style",
     organization         :=  "org.apache.spark",
     version              :=  sparkVersion,
-    scalaVersion         :=  "2.10.3",
+    scalaVersion         :=  "2.10.4",
     scalacOptions        :=  Seq("-unchecked", "-deprecation"),
     libraryDependencies  ++= Dependencies.scalaStyle,
     sbtPlugin            :=  true
diff --git a/sql/README.md b/sql/README.md
index 4192fecb92fb0..14d5555f0c713 100644
--- a/sql/README.md
+++ b/sql/README.md
@@ -38,7 +38,7 @@ import org.apache.spark.sql.catalyst.util._
 import org.apache.spark.sql.execution
 import org.apache.spark.sql.hive._
 import org.apache.spark.sql.hive.TestHive._
-Welcome to Scala version 2.10.3 (Java HotSpot(TM) 64-Bit Server VM, Java 1.7.0_45).
+Welcome to Scala version 2.10.4 (Java HotSpot(TM) 64-Bit Server VM, Java 1.7.0_45).
 Type in expressions to have them evaluated.
 Type :help for more information.