diff --git a/nephele/nephele-clustermanager/pom.xml b/nephele/nephele-clustermanager/pom.xml
index 7282d71f7ba6f6ef3c9b864ded52928f4c58cfaa..30d8696076c2fdc1fdedeaf7a26691129b83bf8a 100644
--- a/nephele/nephele-clustermanager/pom.xml
+++ b/nephele/nephele-clustermanager/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<groupId>eu.stratosphere</groupId>
 		<artifactId>nephele</artifactId>
-		<version>0.4-SNAPSHOT</version>
+		<version>0.4-alpha.2-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/nephele/nephele-common/pom.xml b/nephele/nephele-common/pom.xml
index bc37120589862fbdd5bd372acf62fe7edd254073..db6628ec5d3bb5c5a48dca75ae6f92060890fb47 100644
--- a/nephele/nephele-common/pom.xml
+++ b/nephele/nephele-common/pom.xml
@@ -8,7 +8,7 @@
 	<parent>
 		<artifactId>nephele</artifactId>
 		<groupId>eu.stratosphere</groupId>
-		<version>0.4-SNAPSHOT</version>
+		<version>0.4-alpha.2-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/nephele/nephele-examples/pom.xml b/nephele/nephele-examples/pom.xml
index 23e6b979e4d46f8dbf9c4dbca665f02836ed84c7..51e7c9d95a6395998c9387870562bb3e392097ef 100644
--- a/nephele/nephele-examples/pom.xml
+++ b/nephele/nephele-examples/pom.xml
@@ -8,7 +8,7 @@
 	<parent>
 		<artifactId>nephele</artifactId>
 		<groupId>eu.stratosphere</groupId>
-		<version>0.4-SNAPSHOT</version>
+		<version>0.4-alpha.2-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/nephele/nephele-hdfs/pom.xml b/nephele/nephele-hdfs/pom.xml
index 93cfd34736d30587b0d044e421249db7649daaa7..16f352097e139ed72eb508f0d61a2ed24442c72b 100644
--- a/nephele/nephele-hdfs/pom.xml
+++ b/nephele/nephele-hdfs/pom.xml
@@ -8,7 +8,7 @@
 	<parent>
 		<artifactId>nephele</artifactId>
 		<groupId>eu.stratosphere</groupId>
-		<version>0.4-SNAPSHOT</version>
+		<version>0.4-alpha.2-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/nephele/nephele-management/pom.xml b/nephele/nephele-management/pom.xml
index cd1eadecd0c8468157cb7835dba629e6e1f4d190..e7ef95a56147cae154fe14bdae0bffdee65777ba 100644
--- a/nephele/nephele-management/pom.xml
+++ b/nephele/nephele-management/pom.xml
@@ -8,7 +8,7 @@
 	<parent>
 		<artifactId>nephele</artifactId>
 		<groupId>eu.stratosphere</groupId>
-		<version>0.4-SNAPSHOT</version>
+		<version>0.4-alpha.2-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/nephele/nephele-profiling/pom.xml b/nephele/nephele-profiling/pom.xml
index 7ada513c203b3174e6ebb50c6236f2d03c48f455..d4d8c784fc8f0f3cf5c7e7e6dbf39328f585135b 100644
--- a/nephele/nephele-profiling/pom.xml
+++ b/nephele/nephele-profiling/pom.xml
@@ -8,7 +8,7 @@
 	<parent>
 		<artifactId>nephele</artifactId>
 		<groupId>eu.stratosphere</groupId>
-		<version>0.4-SNAPSHOT</version>
+		<version>0.4-alpha.2-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/nephele/nephele-queuescheduler/pom.xml b/nephele/nephele-queuescheduler/pom.xml
index ed1b121fae134c252bf84ce4de2ce9a3b96365c1..70851ef94827dcf865616ee691ac3c1db8a5b118 100644
--- a/nephele/nephele-queuescheduler/pom.xml
+++ b/nephele/nephele-queuescheduler/pom.xml
@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>eu.stratosphere</groupId>
 		<artifactId>nephele</artifactId>
-		<version>0.4-SNAPSHOT</version>
+		<version>0.4-alpha.2-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 	
diff --git a/nephele/nephele-s3/pom.xml b/nephele/nephele-s3/pom.xml
index 15a89224911fcf2fbc249e2f34e54f5e625da83c..39df1a4b99253a8514890067aec5f6db88fcc793 100644
--- a/nephele/nephele-s3/pom.xml
+++ b/nephele/nephele-s3/pom.xml
@@ -8,7 +8,7 @@
 	<parent>
 		<artifactId>nephele</artifactId>
 		<groupId>eu.stratosphere</groupId>
-		<version>0.4-SNAPSHOT</version>
+		<version>0.4-alpha.2-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/nephele/nephele-server/pom.xml b/nephele/nephele-server/pom.xml
index af20a5a6831b957cecd6926f4a4f5518b1897ff2..efae7e9be31a54ced45251b18f57d6b72fe89281 100644
--- a/nephele/nephele-server/pom.xml
+++ b/nephele/nephele-server/pom.xml
@@ -8,7 +8,7 @@
 	<parent>
 		<artifactId>nephele</artifactId>
 		<groupId>eu.stratosphere</groupId>
-		<version>0.4-SNAPSHOT</version>
+		<version>0.4-alpha.2-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/nephele/nephele-visualization/pom.xml b/nephele/nephele-visualization/pom.xml
index bd1b13654261d2808f6b4275538eaa3a27bb4d76..b8af7e4bfb32ed2d4d6ccb7c878e6d9952654588 100644
--- a/nephele/nephele-visualization/pom.xml
+++ b/nephele/nephele-visualization/pom.xml
@@ -8,7 +8,7 @@
 	<parent>
 		<artifactId>nephele</artifactId>
 		<groupId>eu.stratosphere</groupId>
-		<version>0.4-SNAPSHOT</version>
+		<version>0.4-alpha.2-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/nephele/pom.xml b/nephele/pom.xml
index c35851426f29e9d609325c65f1b16e265928de25..55f8ef77ad810f2d4788d5d7dee81dedfb118820 100644
--- a/nephele/pom.xml
+++ b/nephele/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
 		<groupId>eu.stratosphere</groupId>
 		<artifactId>stratosphere</artifactId>
-		<version>0.4-SNAPSHOT</version>
+		<version>0.4-alpha.2-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/pact-scala/pact-scala-core/pom.xml b/pact-scala/pact-scala-core/pom.xml
index f7e88400fdfc891d53534d9ba2cc5b8eb2466254..5a7dc60cf9ca8588231dfd86ef17e1fd6a99a44a 100644
--- a/pact-scala/pact-scala-core/pom.xml
+++ b/pact-scala/pact-scala-core/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <artifactId>pact-scala</artifactId>
         <groupId>eu.stratosphere</groupId>
-        <version>0.4-SNAPSHOT</version>
+        <version>0.4-alpha.2-SNAPSHOT</version>
         <relativePath>..</relativePath>
     </parent>
 
diff --git a/pact-scala/pact-scala-examples/pom.xml b/pact-scala/pact-scala-examples/pom.xml
index 9843aacbe63a8714c8848090defb26d21a1985d4..e3b0c22d3956ed4b9d33df3c902a2a526f1ff61a 100644
--- a/pact-scala/pact-scala-examples/pom.xml
+++ b/pact-scala/pact-scala-examples/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <artifactId>pact-scala</artifactId>
     <groupId>eu.stratosphere</groupId>
-    <version>0.4-SNAPSHOT</version>
+    <version>0.4-alpha.2-SNAPSHOT</version>
     <relativePath>..</relativePath>
   </parent>
   
diff --git a/pact-scala/pact-scala-scratch/pom.xml b/pact-scala/pact-scala-scratch/pom.xml
index 6b18b791a3335569eaffbb76f70de52adda78dc4..5feb659ecd6611aec9aaa404e64e360731550b0b 100644
--- a/pact-scala/pact-scala-scratch/pom.xml
+++ b/pact-scala/pact-scala-scratch/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <artifactId>pact-scala</artifactId>
     <groupId>eu.stratosphere</groupId>
-    <version>0.4-SNAPSHOT</version>
+    <version>0.4-alpha.2-SNAPSHOT</version>
     <relativePath>..</relativePath>
   </parent>
 
diff --git a/pact-scala/pact-scala-tests/pom.xml b/pact-scala/pact-scala-tests/pom.xml
index d956af6b2f330c54e4ccb24725f8202fa8b00827..e71795aaf5d4949b13f69dca212909a32f6ae73f 100644
--- a/pact-scala/pact-scala-tests/pom.xml
+++ b/pact-scala/pact-scala-tests/pom.xml
@@ -7,7 +7,7 @@
   <parent>
 	<artifactId>pact-scala</artifactId>
 	<groupId>eu.stratosphere</groupId>
-	<version>0.4-SNAPSHOT</version>
+	<version>0.4-alpha.2-SNAPSHOT</version>
 	<relativePath>..</relativePath>
   </parent>
 
diff --git a/pact-scala/pom.xml b/pact-scala/pom.xml
index 3a11b240637ec3620be8482387024852ed3aec7a..e25e9709aee002536c80349dbfae115ef568c748 100644
--- a/pact-scala/pom.xml
+++ b/pact-scala/pom.xml
@@ -8,7 +8,7 @@
     <parent>
 		<groupId>eu.stratosphere</groupId>
 		<artifactId>stratosphere</artifactId>
-		<version>0.4-SNAPSHOT</version>
+		<version>0.4-alpha.2-SNAPSHOT</version>
 		<relativePath>..</relativePath>
     </parent>
 
diff --git a/pact/pact-array-datamodel/pom.xml b/pact/pact-array-datamodel/pom.xml
index b47200209449403345e519a5ac47564c870ce1d6..0f43353c2437f34f050ed0d7b6e6d12c2ac6d117 100644
--- a/pact/pact-array-datamodel/pom.xml
+++ b/pact/pact-array-datamodel/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
 		<artifactId>pact</artifactId>
 		<groupId>eu.stratosphere</groupId>
-		<version>0.4-SNAPSHOT</version>
+		<version>0.4-alpha.2-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 	
diff --git a/pact/pact-clients/pom.xml b/pact/pact-clients/pom.xml
index 5c8716c93ace139a3c495616e5097d885ab3dde7..3b5a27bc5b83374d6b0b38fcaea3e1b2846f5146 100644
--- a/pact/pact-clients/pom.xml
+++ b/pact/pact-clients/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
 		<artifactId>pact</artifactId>
 		<groupId>eu.stratosphere</groupId>
-		<version>0.4-SNAPSHOT</version>
+		<version>0.4-alpha.2-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/pact/pact-common/pom.xml b/pact/pact-common/pom.xml
index 2b33f729a0da55f41ad58dea5e7e603a3d076079..7e0f74486534a2e9fab42a890cc51d4d9ba3921e 100644
--- a/pact/pact-common/pom.xml
+++ b/pact/pact-common/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
 		<artifactId>pact</artifactId>
 		<groupId>eu.stratosphere</groupId>
-		<version>0.4-SNAPSHOT</version>
+		<version>0.4-alpha.2-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/pact/pact-compiler/pom.xml b/pact/pact-compiler/pom.xml
index 25610937166c641f64604dfcf936881d0e5eca52..b0a60ce2975f1b8fe1c8686af33546e70639b203 100644
--- a/pact/pact-compiler/pom.xml
+++ b/pact/pact-compiler/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
 		<artifactId>pact</artifactId>
 		<groupId>eu.stratosphere</groupId>
-		<version>0.4-SNAPSHOT</version>
+		<version>0.4-alpha.2-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/pact/pact-examples/pom.xml b/pact/pact-examples/pom.xml
index 5eeb3e277b457926565873dabc10abce5b87f030..60cc3e93cb0563cbc1ff9189a29b0b0caa96b077 100644
--- a/pact/pact-examples/pom.xml
+++ b/pact/pact-examples/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
 		<artifactId>pact</artifactId>
 		<groupId>eu.stratosphere</groupId>
-		<version>0.4-SNAPSHOT</version>
+		<version>0.4-alpha.2-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/pact/pact-hbase/pom.xml b/pact/pact-hbase/pom.xml
index b9c5369855d77aaf5da3b2c42affca29c829620e..e8a34dfb4785eab817527d6188a0a4ead9eb6524 100644
--- a/pact/pact-hbase/pom.xml
+++ b/pact/pact-hbase/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
 		<artifactId>pact</artifactId>
 		<groupId>eu.stratosphere</groupId>
-		<version>0.4-SNAPSHOT</version>
+		<version>0.4-alpha.2-SNAPSHOT</version>
 	    <relativePath>..</relativePath>
     </parent>
   
diff --git a/pact/pact-runtime/pom.xml b/pact/pact-runtime/pom.xml
index 3b1204e1493ec8005b9f6b6f4c88513ee9302dc3..951d91c2d1b67e490571333555d848f90945b3c1 100644
--- a/pact/pact-runtime/pom.xml
+++ b/pact/pact-runtime/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
 		<artifactId>pact</artifactId>
 		<groupId>eu.stratosphere</groupId>
-		<version>0.4-SNAPSHOT</version>
+		<version>0.4-alpha.2-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/pact/pact-tests/pom.xml b/pact/pact-tests/pom.xml
index e79c4988af5a89dec5a18da7b2404c1226f743d5..5487dec8bd41103a49e870fec24a4c65870222c5 100644
--- a/pact/pact-tests/pom.xml
+++ b/pact/pact-tests/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
 		<artifactId>pact</artifactId>
 		<groupId>eu.stratosphere</groupId>
-		<version>0.4-SNAPSHOT</version>
+		<version>0.4-alpha.2-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/pact/pom.xml b/pact/pom.xml
index 42a40be44601aed5e3891f7afa6394a431b4c961..8b5ba39e1075e689d1147b6cd4149ce9f7d5aa5f 100644
--- a/pact/pom.xml
+++ b/pact/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
 		<groupId>eu.stratosphere</groupId>
 		<artifactId>stratosphere</artifactId>
-		<version>0.4-SNAPSHOT</version>
+		<version>0.4-alpha.2-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/pom.xml b/pom.xml
index a73c3bf75ce68ae48c8179d8e36327cb0061f7d5..6a5626e2cb57cafb727e725150eb7faae03a13de 100644
--- a/pom.xml
+++ b/pom.xml
@@ -12,7 +12,7 @@
 
 	<groupId>eu.stratosphere</groupId>
 	<artifactId>stratosphere</artifactId>
-	<version>0.4-SNAPSHOT</version>
+	<version>0.4-alpha.2-SNAPSHOT</version>
 
 	<name>stratosphere</name>
 	<packaging>pom</packaging>
diff --git a/stratosphere-dist/pom.xml b/stratosphere-dist/pom.xml
index 76bc39dd312d323a18f31e5381b8ac6c01cd53c1..88fb9c19385370795f01cd695d1cb21e8a99f390 100644
--- a/stratosphere-dist/pom.xml
+++ b/stratosphere-dist/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
 		<groupId>eu.stratosphere</groupId>
 		<artifactId>stratosphere</artifactId>
-		<version>0.4-SNAPSHOT</version>
+		<version>0.4-alpha.2-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/tools/change-version b/tools/change-version
index 06bea7b214575c8d01073197e2b9d4fd028ef9f0..e35117de26a5aeacc216ee77659ae60bf31a2f01 100755
--- a/tools/change-version
+++ b/tools/change-version
@@ -1,2 +1,2 @@
 #!/bin/bash
-find .. -name 'pom.xml' -type f -exec sed -i 's#<version>0.4-SNAPSHOT</version>#<version>0.4-alpha.0</version>#' {} \;
+find .. -name 'pom.xml' -type f -exec sed -i 's#<version>0.4-SNAPSHOT</version>#<version>0.4-alpha.2-SNAPSHOT</version>#' {} \;