diff --git a/R/pkg/DESCRIPTION b/R/pkg/DESCRIPTION
index f237df1fb854d..7e9fd2df13dbe 100644
--- a/R/pkg/DESCRIPTION
+++ b/R/pkg/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: SparkR
 Type: Package
 Title: R frontend for Spark
-Version: 1.6.4
+Version: 1.6.3
 Date: 2013-09-09
 Author: The Apache Software Foundation
 Maintainer: Shivaram Venkataraman <shivaram@cs.berkeley.edu>
diff --git a/assembly/pom.xml b/assembly/pom.xml
index 13cf555a5f7fc..8e9747efd4b2d 100644
--- a/assembly/pom.xml
+++ b/assembly/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/bagel/pom.xml b/bagel/pom.xml
index e080625a82ab8..a73a18ad651c3 100644
--- a/bagel/pom.xml
+++ b/bagel/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/core/pom.xml b/core/pom.xml
index f60bd00036227..c232046fb56fc 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/docker-integration-tests/pom.xml b/docker-integration-tests/pom.xml
index 8d5eb4096d1e2..8514b48c638ed 100644
--- a/docker-integration-tests/pom.xml
+++ b/docker-integration-tests/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/docs/_config.yml b/docs/_config.yml
index ee235bcfa3edb..81dcb2c71fa1b 100644
--- a/docs/_config.yml
+++ b/docs/_config.yml
@@ -14,8 +14,8 @@ include:
 
 # These allow the documentation to be updated with newer releases
 # of Spark, Scala, and Mesos.
-SPARK_VERSION: 1.6.4-SNAPSHOT
-SPARK_VERSION_SHORT: 1.6.4
+SPARK_VERSION: 1.6.3
+SPARK_VERSION_SHORT: 1.6.3
 SCALA_BINARY_VERSION: "2.10"
 SCALA_VERSION: "2.10.5"
 MESOS_VERSION: 0.21.0
diff --git a/examples/pom.xml b/examples/pom.xml
index 4df369ba335c8..87850fec05497 100644
--- a/examples/pom.xml
+++ b/examples/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/external/flume-assembly/pom.xml b/external/flume-assembly/pom.xml
index 048009752b4d1..0173c0873201c 100644
--- a/external/flume-assembly/pom.xml
+++ b/external/flume-assembly/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/external/flume-sink/pom.xml b/external/flume-sink/pom.xml
index 3046fad8c01cb..c513404b2e139 100644
--- a/external/flume-sink/pom.xml
+++ b/external/flume-sink/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/external/flume/pom.xml b/external/flume/pom.xml
index ce0bc7303e02f..bbd6215999113 100644
--- a/external/flume/pom.xml
+++ b/external/flume/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/external/kafka-assembly/pom.xml b/external/kafka-assembly/pom.xml
index 536d198aa909e..bb86e2ce64353 100644
--- a/external/kafka-assembly/pom.xml
+++ b/external/kafka-assembly/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/external/kafka/pom.xml b/external/kafka/pom.xml
index 8a0f69eda5c53..82ed3373548c8 100644
--- a/external/kafka/pom.xml
+++ b/external/kafka/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/external/mqtt-assembly/pom.xml b/external/mqtt-assembly/pom.xml
index 2ee76f7930973..c528bc11c3b67 100644
--- a/external/mqtt-assembly/pom.xml
+++ b/external/mqtt-assembly/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/external/mqtt/pom.xml b/external/mqtt/pom.xml
index 4b549d3efe864..fa27970a61c6d 100644
--- a/external/mqtt/pom.xml
+++ b/external/mqtt/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/external/twitter/pom.xml b/external/twitter/pom.xml
index 851e4ca8439b9..270d078e60b15 100644
--- a/external/twitter/pom.xml
+++ b/external/twitter/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/external/zeromq/pom.xml b/external/zeromq/pom.xml
index 0d9868fb444e1..0160b058fbffb 100644
--- a/external/zeromq/pom.xml
+++ b/external/zeromq/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extras/java8-tests/pom.xml b/extras/java8-tests/pom.xml
index 65375b4c2c121..aaf2973fb67ee 100644
--- a/extras/java8-tests/pom.xml
+++ b/extras/java8-tests/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extras/kinesis-asl-assembly/pom.xml b/extras/kinesis-asl-assembly/pom.xml
index c4a829d267544..2de3837b79d0e 100644
--- a/extras/kinesis-asl-assembly/pom.xml
+++ b/extras/kinesis-asl-assembly/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extras/kinesis-asl/pom.xml b/extras/kinesis-asl/pom.xml
index cd1d9101791f5..3a604fae56133 100644
--- a/extras/kinesis-asl/pom.xml
+++ b/extras/kinesis-asl/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/extras/spark-ganglia-lgpl/pom.xml b/extras/spark-ganglia-lgpl/pom.xml
index 9d8f0f367b547..40ea8816188ef 100644
--- a/extras/spark-ganglia-lgpl/pom.xml
+++ b/extras/spark-ganglia-lgpl/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/graphx/pom.xml b/graphx/pom.xml
index 59f33c16aa4fc..7ad15a95ca598 100644
--- a/graphx/pom.xml
+++ b/graphx/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/launcher/pom.xml b/launcher/pom.xml
index 0a3d23d3c0b03..d0aa350a6b752 100644
--- a/launcher/pom.xml
+++ b/launcher/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/mllib/pom.xml b/mllib/pom.xml
index 0cbc26060f74b..d4c7a4013c3c2 100644
--- a/mllib/pom.xml
+++ b/mllib/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/network/common/pom.xml b/network/common/pom.xml
index ad6ebfb3c5772..7d1f76efdc039 100644
--- a/network/common/pom.xml
+++ b/network/common/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/network/shuffle/pom.xml b/network/shuffle/pom.xml
index 0c1883611114f..6775324e0fdbb 100644
--- a/network/shuffle/pom.xml
+++ b/network/shuffle/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/network/yarn/pom.xml b/network/yarn/pom.xml
index 93d9c715702a4..27f58047e6568 100644
--- a/network/yarn/pom.xml
+++ b/network/yarn/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/pom.xml b/pom.xml
index 092800d5908df..dd27885ec198e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -26,7 +26,7 @@
   </parent>
   <groupId>org.apache.spark</groupId>
   <artifactId>spark-parent_2.10</artifactId>
-  <version>1.6.4-SNAPSHOT</version>
+  <version>1.6.3</version>
   <packaging>pom</packaging>
   <name>Spark Project Parent POM</name>
   <url>http://spark.apache.org/</url>
diff --git a/repl/pom.xml b/repl/pom.xml
index c6c5c130de6f8..f11e2f1b4d09f 100644
--- a/repl/pom.xml
+++ b/repl/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/sql/catalyst/pom.xml b/sql/catalyst/pom.xml
index 5652230aed9d2..95b2e1e045178 100644
--- a/sql/catalyst/pom.xml
+++ b/sql/catalyst/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/sql/core/pom.xml b/sql/core/pom.xml
index 7772012ec0dc5..09d4ec37312df 100644
--- a/sql/core/pom.xml
+++ b/sql/core/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/sql/hive-thriftserver/pom.xml b/sql/hive-thriftserver/pom.xml
index 4434cc930b48e..05806a1feb38e 100644
--- a/sql/hive-thriftserver/pom.xml
+++ b/sql/hive-thriftserver/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/sql/hive/pom.xml b/sql/hive/pom.xml
index 06c2069e9cab5..b07f1fea1a058 100644
--- a/sql/hive/pom.xml
+++ b/sql/hive/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/streaming/pom.xml b/streaming/pom.xml
index 2cef01ea953fd..8f0ecdff55686 100644
--- a/streaming/pom.xml
+++ b/streaming/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/tags/pom.xml b/tags/pom.xml
index 6db0fd315af6e..380f10124f7b2 100644
--- a/tags/pom.xml
+++ b/tags/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/tools/pom.xml b/tools/pom.xml
index 9f0f3afa25104..c22d6f7497979 100644
--- a/tools/pom.xml
+++ b/tools/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/unsafe/pom.xml b/unsafe/pom.xml
index 1b0980ce1d393..11a617fe55f61 100644
--- a/unsafe/pom.xml
+++ b/unsafe/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/yarn/pom.xml b/yarn/pom.xml
index 0ca8e6283804d..cb11684f8ea2c 100644
--- a/yarn/pom.xml
+++ b/yarn/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent_2.10</artifactId>
-    <version>1.6.4-SNAPSHOT</version>
+    <version>1.6.3</version>
     <relativePath>../pom.xml</relativePath>
   </parent>