diff --git a/common/pom.xml b/common/pom.xml
index e052769..7c048c5 100644
--- a/common/pom.xml
+++ b/common/pom.xml
@@ -20,7 +20,7 @@
 	<parent>
 		<groupId>it.polimi.tower4clouds</groupId>
 		<artifactId>tower4clouds</artifactId>
-		<version>0.3-SNAPSHOT</version>
+		<version>0.2.1</version>
 	</parent>
 	<artifactId>common</artifactId>
 	<name>MODAClous - Tower4Clouds - Common Libraries</name>
diff --git a/data-analyzer/pom.xml b/data-analyzer/pom.xml
index 0a174e8..5a68f35 100644
--- a/data-analyzer/pom.xml
+++ b/data-analyzer/pom.xml
@@ -20,7 +20,7 @@
 	<parent>
 		<groupId>it.polimi.tower4clouds</groupId>
 		<artifactId>tower4clouds</artifactId>
-		<version>0.3-SNAPSHOT</version>
+		<version>0.2.1</version>
 	</parent>
 	<artifactId>data-analyzer</artifactId>
 	<name>MODAClous - Tower4Clouds - Data Analyzer</name>
diff --git a/data-collector-library/pom.xml b/data-collector-library/pom.xml
index dd10437..5f70d8a 100644
--- a/data-collector-library/pom.xml
+++ b/data-collector-library/pom.xml
@@ -20,7 +20,7 @@
 	<parent>
 		<groupId>it.polimi.tower4clouds</groupId>
 		<artifactId>tower4clouds</artifactId>
-		<version>0.3-SNAPSHOT</version>
+		<version>0.2.1</version>
 	</parent>
 	<artifactId>data-collector-library</artifactId>
 	<name>MODAClous - Tower4Clouds - Data Collector Library</name>
diff --git a/data-collectors/java-app-dc/pom.xml b/data-collectors/java-app-dc/pom.xml
index be5869d..db26999 100644
--- a/data-collectors/java-app-dc/pom.xml
+++ b/data-collectors/java-app-dc/pom.xml
@@ -20,7 +20,7 @@
 	<parent>
 		<groupId>it.polimi.tower4clouds</groupId>
 		<artifactId>data-collectors</artifactId>
-		<version>0.3-SNAPSHOT</version>
+		<version>0.2.1</version>
 	</parent>
 	<artifactId>java-app-dc</artifactId>
 	<name>MODAClous - Tower4Clouds - Java Application Data Collector</name>
diff --git a/data-collectors/pom.xml b/data-collectors/pom.xml
index 67453f9..383b1e6 100644
--- a/data-collectors/pom.xml
+++ b/data-collectors/pom.xml
@@ -20,7 +20,7 @@
 	<parent>
 		<groupId>it.polimi.tower4clouds</groupId>
 		<artifactId>tower4clouds</artifactId>
-		<version>0.3-SNAPSHOT</version>
+		<version>0.2.1</version>
 	</parent>
 	<artifactId>data-collectors</artifactId>
 	<name>MODAClous - Tower4Clouds - Data Collectors Parent Pom</name>
diff --git a/integration/pom.xml b/integration/pom.xml
index 5d044c3..8ae7b8d 100644
--- a/integration/pom.xml
+++ b/integration/pom.xml
@@ -20,7 +20,7 @@
 	<parent>
 		<groupId>it.polimi.tower4clouds</groupId>
 		<artifactId>tower4clouds</artifactId>
-		<version>0.3-SNAPSHOT</version>
+		<version>0.2.1</version>
 	</parent>
 	<artifactId>integration</artifactId>
 	<name>MODAClous - Tower4Clouds - Integration Module</name>
diff --git a/manager/manager-api/pom.xml b/manager/manager-api/pom.xml
index af13b0d..149ba32 100644
--- a/manager/manager-api/pom.xml
+++ b/manager/manager-api/pom.xml
@@ -20,7 +20,7 @@
 	<parent>
 		<groupId>it.polimi.tower4clouds</groupId>
 		<artifactId>manager</artifactId>
-		<version>0.3-SNAPSHOT</version>
+		<version>0.2.1</version>
 	</parent>
 	<artifactId>manager-api</artifactId>
 	<name>MODAClous - Tower4Clouds - Manager API Library</name>
diff --git a/manager/manager-core/pom.xml b/manager/manager-core/pom.xml
index 48c809f..3cdbf2f 100644
--- a/manager/manager-core/pom.xml
+++ b/manager/manager-core/pom.xml
@@ -20,7 +20,7 @@
 	<parent>
 		<groupId>it.polimi.tower4clouds</groupId>
 		<artifactId>manager</artifactId>
-		<version>0.3-SNAPSHOT</version>
+		<version>0.2.1</version>
 	</parent>
 	<artifactId>manager-core</artifactId>
 	<name>MODAClous - Tower4Clouds - Manager Core Library</name>
diff --git a/manager/manager-server/pom.xml b/manager/manager-server/pom.xml
index 8938e9c..447c562 100644
--- a/manager/manager-server/pom.xml
+++ b/manager/manager-server/pom.xml
@@ -20,7 +20,7 @@
 	<parent>
 		<groupId>it.polimi.tower4clouds</groupId>
 		<artifactId>manager</artifactId>
-		<version>0.3-SNAPSHOT</version>
+		<version>0.2.1</version>
 	</parent>
 	<artifactId>manager-server</artifactId>
 	<name>MODAClous - Tower4Clouds - Manager Server</name>
diff --git a/manager/pom.xml b/manager/pom.xml
index c46c1bc..2261149 100644
--- a/manager/pom.xml
+++ b/manager/pom.xml
@@ -20,7 +20,7 @@
 	<parent>
 		<groupId>it.polimi.tower4clouds</groupId>
 		<artifactId>tower4clouds</artifactId>
-		<version>0.3-SNAPSHOT</version>
+		<version>0.2.1</version>
 	</parent>
 	<artifactId>manager</artifactId>
 	<name>MODAClous - Tower4Clouds - Manager Parent Pom</name>
diff --git a/model/pom.xml b/model/pom.xml
index a31e76c..062559c 100644
--- a/model/pom.xml
+++ b/model/pom.xml
@@ -20,7 +20,7 @@
 	<parent>
 		<groupId>it.polimi.tower4clouds</groupId>
 		<artifactId>tower4clouds</artifactId>
-		<version>0.3-SNAPSHOT</version>
+		<version>0.2.1</version>
 	</parent>
 	<artifactId>model</artifactId>
 	<name>MODAClous - Tower4Clouds - Model Library</name>
diff --git a/observers/data2stdout/pom.xml b/observers/data2stdout/pom.xml
index 879d78e..3cc6582 100644
--- a/observers/data2stdout/pom.xml
+++ b/observers/data2stdout/pom.xml
@@ -20,7 +20,7 @@
 	<parent>
 		<groupId>it.polimi.tower4clouds</groupId>
 		<artifactId>observers</artifactId>
-		<version>0.3-SNAPSHOT</version>
+		<version>0.2.1</version>
 	</parent>
 	<artifactId>data2stdout</artifactId>
 	<name>MODAClouds - Tower4Clouds - Data2STDOUT Observer</name>
diff --git a/observers/pom.xml b/observers/pom.xml
index b51a45f..ff28f53 100644
--- a/observers/pom.xml
+++ b/observers/pom.xml
@@ -21,7 +21,7 @@
   <parent>
         <artifactId>tower4clouds</artifactId>
         <groupId>it.polimi.tower4clouds</groupId>
-        <version>0.3-SNAPSHOT</version>
+        <version>0.2.1</version>
     </parent>
   <artifactId>observers</artifactId>
   <packaging>pom</packaging>
diff --git a/observers/rdf-history-db/pom.xml b/observers/rdf-history-db/pom.xml
index 9697c8b..a317259 100644
--- a/observers/rdf-history-db/pom.xml
+++ b/observers/rdf-history-db/pom.xml
@@ -21,7 +21,7 @@
 	<parent>
 		<artifactId>observers</artifactId>
 		<groupId>it.polimi.tower4clouds</groupId>
-		<version>0.3-SNAPSHOT</version>
+		<version>0.2.1</version>
 	</parent>
 	<artifactId>rdf-history-db</artifactId>
 	<packaging>pom</packaging>
diff --git a/observers/rdf-history-db/rdf-history-db-api/pom.xml b/observers/rdf-history-db/rdf-history-db-api/pom.xml
index c4332bb..13ebc3f 100644
--- a/observers/rdf-history-db/rdf-history-db-api/pom.xml
+++ b/observers/rdf-history-db/rdf-history-db-api/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>it.polimi.tower4clouds</groupId>
     <artifactId>rdf-history-db</artifactId>
-    <version>0.3-SNAPSHOT</version>
+    <version>0.2.1</version>
   </parent>
   <artifactId>rdf-history-db-api</artifactId>
   <packaging>jar</packaging>
diff --git a/observers/rdf-history-db/rdf-history-db-main/pom.xml b/observers/rdf-history-db/rdf-history-db-main/pom.xml
index 97b3705..c672680 100644
--- a/observers/rdf-history-db/rdf-history-db-main/pom.xml
+++ b/observers/rdf-history-db/rdf-history-db-main/pom.xml
@@ -16,14 +16,13 @@
     limitations under the License.
 
 -->
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 
 	<parent>
 		<groupId>it.polimi.tower4clouds</groupId>
 		<artifactId>rdf-history-db</artifactId>
-		<version>0.3-SNAPSHOT</version>
+		<version>0.2.1</version>
 	</parent>
 	<artifactId>rdf-history-db-main</artifactId>
 	<name>MODAClouds - Tower4Clouds - RDF History DB</name>
diff --git a/observers/rdf-history-db/rdf-history-db-manager/pom.xml b/observers/rdf-history-db/rdf-history-db-manager/pom.xml
index 0b25c4e..d1478d3 100644
--- a/observers/rdf-history-db/rdf-history-db-manager/pom.xml
+++ b/observers/rdf-history-db/rdf-history-db-manager/pom.xml
@@ -22,7 +22,7 @@
 	<parent>
 		<groupId>it.polimi.tower4clouds</groupId>
 		<artifactId>rdf-history-db</artifactId>
-		<version>0.3-SNAPSHOT</version>
+		<version>0.2.1</version>
 	</parent>
 	<artifactId>rdf-history-db-manager</artifactId>
 	<name>MODAClous - Tower4Clouds - RDF History DB Manager Library</name>
diff --git a/observers/rdf-history-db/rdf-history-db-observer/pom.xml b/observers/rdf-history-db/rdf-history-db-observer/pom.xml
index 0257e2c..614a03f 100644
--- a/observers/rdf-history-db/rdf-history-db-observer/pom.xml
+++ b/observers/rdf-history-db/rdf-history-db-observer/pom.xml
@@ -22,7 +22,7 @@
 	<parent>
 		<groupId>it.polimi.tower4clouds</groupId>
 		<artifactId>rdf-history-db</artifactId>
-		<version>0.3-SNAPSHOT</version>
+		<version>0.2.1</version>
 	</parent>
 	<artifactId>rdf-history-db-observer</artifactId>
 	<name>MODAClous - Tower4Clouds - RDF History DB Observer Library</name>
diff --git a/pom.xml b/pom.xml
index d46e0bd..5f754cc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -16,11 +16,10 @@
     limitations under the License.
 
 -->
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>it.polimi.tower4clouds</groupId>
-	<version>0.3-SNAPSHOT</version>
+	<version>0.2.1</version>
 	<artifactId>tower4clouds</artifactId>
 	<packaging>pom</packaging>
 	<name>MODAClous - Tower4Clouds - Parent Pom</name>
@@ -90,7 +89,7 @@
 	<scm>
 		<connection>scm:git:git@github.com:deib-polimi/tower4clouds.git</connection>
 		<developerConnection>scm:git:git@github.com:deib-polimi/tower4clouds.git</developerConnection>
-		<tag>HEAD</tag>
+		<tag>v0.2.1</tag>
 		<url>https://github.com/deib-polimi/tower4clouds</url>
 	</scm>
 
diff --git a/rules/pom.xml b/rules/pom.xml
index 12c3cec..ff43e2a 100644
--- a/rules/pom.xml
+++ b/rules/pom.xml
@@ -20,7 +20,7 @@
 	<parent>
 		<groupId>it.polimi.tower4clouds</groupId>
 		<artifactId>tower4clouds</artifactId>
-		<version>0.3-SNAPSHOT</version>
+		<version>0.2.1</version>
 	</parent>
 	<artifactId>rules</artifactId>
 	<name>MODAClous - Tower4Clouds - Rules Library</name>
diff --git a/use-cases/fakeapps4testing/pom.xml b/use-cases/fakeapps4testing/pom.xml
index 21efbca..8109f85 100644
--- a/use-cases/fakeapps4testing/pom.xml
+++ b/use-cases/fakeapps4testing/pom.xml
@@ -20,7 +20,7 @@
 	<parent>
 		<groupId>it.polimi.tower4clouds</groupId>
 		<artifactId>use-cases</artifactId>
-		<version>0.3-SNAPSHOT</version>
+		<version>0.2.1</version>
 	</parent>
 	<artifactId>fakeapps4testing</artifactId>
 	<packaging>jar</packaging>
diff --git a/use-cases/pom.xml b/use-cases/pom.xml
index 8882f5b..0439cf9 100644
--- a/use-cases/pom.xml
+++ b/use-cases/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>it.polimi.tower4clouds</groupId>
     <artifactId>tower4clouds</artifactId>
-    <version>0.3-SNAPSHOT</version>
+    <version>0.2.1</version>
   </parent>
   <artifactId>use-cases</artifactId>
   <name>MODAClous - Tower4Clouds - Use Cases Parent Pom</name>