diff --git a/assembly/pom.xml b/assembly/pom.xml
index 2faa3ff33ca353562f7a2bb33a7f73474c9b7f1d..a99e3d2a025696822211a43ed3fdaa34e7d5d8e9 100644
--- a/assembly/pom.xml
+++ b/assembly/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent</artifactId>
-    <version>0.9.0-incubating</version>
+    <version>0.9.1-incubating-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/bagel/pom.xml b/bagel/pom.xml
index 0dcc2983c821f00ed86348c494105f00d2458273..42e624402f77e5592f53dd7211b189d24a2ef77e 100644
--- a/bagel/pom.xml
+++ b/bagel/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent</artifactId>
-    <version>0.9.0-incubating</version>
+    <version>0.9.1-incubating-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/core/pom.xml b/core/pom.xml
index 62ceba186ab4648ed5653896af3bd60e30ce995d..abf48935cd9157921207ba6f5260473360d22f84 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -21,7 +21,7 @@
     <parent>
         <groupId>org.apache.spark</groupId>
         <artifactId>spark-parent</artifactId>
-        <version>0.9.0-incubating</version>
+        <version>0.9.1-incubating-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/examples/pom.xml b/examples/pom.xml
index a30d0b3fa09067f89a09d4652a5c0be4bc248596..967556744c1e60efa2d338aa97022d2bb33915dd 100644
--- a/examples/pom.xml
+++ b/examples/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent</artifactId>
-    <version>0.9.0-incubating</version>
+    <version>0.9.1-incubating-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/external/flume/pom.xml b/external/flume/pom.xml
index f3da4f5abe101d2181219ec7e311fe394dcd692f..978b99f4a70542a7ea3e888bf3f88d3089059166 100644
--- a/external/flume/pom.xml
+++ b/external/flume/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent</artifactId>
-    <version>0.9.0-incubating</version>
+    <version>0.9.1-incubating-SNAPSHOT</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/external/kafka/pom.xml b/external/kafka/pom.xml
index f9c97673ad8aea483e6c16d008090505ec0c278a..a3d5fc64f070ed43c38a2630534e7e19ff16e356 100644
--- a/external/kafka/pom.xml
+++ b/external/kafka/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent</artifactId>
-    <version>0.9.0-incubating</version>
+    <version>0.9.1-incubating-SNAPSHOT</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/external/mqtt/pom.xml b/external/mqtt/pom.xml
index 7e438cca101b59bb0c8b3e3703e44e773b953015..1f416dd8c06d410df1916a35fde3823c9275bfe8 100644
--- a/external/mqtt/pom.xml
+++ b/external/mqtt/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent</artifactId>
-    <version>0.9.0-incubating</version>
+    <version>0.9.1-incubating-SNAPSHOT</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/external/twitter/pom.xml b/external/twitter/pom.xml
index 2ec96be677946920bb28c6d80107fb991851385d..f23091684f95ce8957061b991e7750b450f747c5 100644
--- a/external/twitter/pom.xml
+++ b/external/twitter/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent</artifactId>
-    <version>0.9.0-incubating</version>
+    <version>0.9.1-incubating-SNAPSHOT</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/external/zeromq/pom.xml b/external/zeromq/pom.xml
index 6e644a534232509fb3e2ba282326df3162f933ab..6a250b3916ead12253f20f3eca5de1166fd99057 100644
--- a/external/zeromq/pom.xml
+++ b/external/zeromq/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent</artifactId>
-    <version>0.9.0-incubating</version>
+    <version>0.9.1-incubating-SNAPSHOT</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/graphx/pom.xml b/graphx/pom.xml
index daadc73774e8dec6207527df57b6902a105c7259..67a8e015872cc61bc95351dd8bd7735ed2661906 100644
--- a/graphx/pom.xml
+++ b/graphx/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent</artifactId>
-    <version>0.9.0-incubating</version>
+    <version>0.9.1-incubating-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/mllib/pom.xml b/mllib/pom.xml
index 6f024f6f538ecb3bae705e0c1ecb70682a91d1ee..41600c4c4b56189761b39afb9ca051db0f2007a5 100644
--- a/mllib/pom.xml
+++ b/mllib/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent</artifactId>
-    <version>0.9.0-incubating</version>
+    <version>0.9.1-incubating-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/pom.xml b/pom.xml
index e1cf107965fb750b72a59d89d186546a66fe74a2..150dba8d636d88d4f65d6fea5cd8c0b564f21763 100644
--- a/pom.xml
+++ b/pom.xml
@@ -25,7 +25,7 @@
   </parent>
   <groupId>org.apache.spark</groupId>
   <artifactId>spark-parent</artifactId>
-  <version>0.9.0-incubating</version>
+  <version>0.9.1-incubating-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>Spark Project Parent POM</name>
   <url>http://spark.incubator.apache.org/</url>
@@ -40,7 +40,7 @@
     <connection>scm:git:git@github.com:apache/incubator-spark.git</connection>
     <developerConnection>scm:git:https://git-wip-us.apache.org/repos/asf/incubator-spark.git</developerConnection>
     <url>scm:git:git@github.com:apache/incubator-spark.git</url>
-    <tag>v0.9.0-incubating</tag>
+    <tag>HEAD</tag>
   </scm>
   <developers>
     <developer>
diff --git a/repl/pom.xml b/repl/pom.xml
index 0d73cfa84126b2044508dbc1489cff1590593fc5..346c672165d7d1641bda81555fbea7db58e23064 100644
--- a/repl/pom.xml
+++ b/repl/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent</artifactId>
-    <version>0.9.0-incubating</version>
+    <version>0.9.1-incubating-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/streaming/pom.xml b/streaming/pom.xml
index 90b65fc118ec6d4434ecb95706564354712292f8..7e10ef6f471be288401bc0c31e27fa42a57031e3 100644
--- a/streaming/pom.xml
+++ b/streaming/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent</artifactId>
-    <version>0.9.0-incubating</version>
+    <version>0.9.1-incubating-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/tools/pom.xml b/tools/pom.xml
index be77741d591ae6e2c2a7b78eb9a314c8a266b483..bb8f747ae9328541a0ab9d8d69028f0a3c46cfc7 100644
--- a/tools/pom.xml
+++ b/tools/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent</artifactId>
-    <version>0.9.0-incubating</version>
+    <version>0.9.1-incubating-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/yarn/pom.xml b/yarn/pom.xml
index 3383a227590c5d86d0b188fb9d78fcf506ef7f5b..508317b5fc01c1bb18354c485daed75f8ee0c3a9 100644
--- a/yarn/pom.xml
+++ b/yarn/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent</artifactId>
-    <version>0.9.0-incubating</version>
+    <version>0.9.1-incubating-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/yarn/stable/pom.xml b/yarn/stable/pom.xml
index cf915a1a259d8b523f0329fb8ed05e2df4483cf1..04b29c76e5830dd07d08a021399f63dfb12e0ef7 100644
--- a/yarn/stable/pom.xml
+++ b/yarn/stable/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>yarn-parent_2.10</artifactId>
-    <version>0.9.0-incubating</version>
+    <version>0.9.1-incubating-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>