Usually we follow ES version for this project version

Author: xdegenne

elasticsearch-annotations/pom.xml

@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.alien4cloud</groupId>
         <artifactId>elasticsearch-mapping-parent</artifactId>
-        <version>2.0.0-SNAPSHOT</version>
+        <version>6.6.2-SNAPSHOT</version>
     </parent>
 
     <artifactId>elasticsearch-annotations</artifactId>

elasticsearch-mapping/pom.xml

@@ -4,13 +4,13 @@
     <parent>
         <groupId>org.alien4cloud</groupId>
         <artifactId>elasticsearch-mapping-parent</artifactId>
-        <version>2.0.0-SNAPSHOT</version>
+        <version>6.6.2-SNAPSHOT</version>
     </parent>
 
     <artifactId>elasticsearch-mapping</artifactId>
     <name>Elastic search mapping.</name>
     <description>Object mapping for elastic search.</description>
-    
+
     <dependencies>
         <dependency>
             <groupId>org.elasticsearch</groupId>

pom.xml

@@ -3,7 +3,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>org.alien4cloud</groupId>
     <artifactId>elasticsearch-mapping-parent</artifactId>
-    <version>2.0.0-SNAPSHOT</version>
+    <version>6.6.2-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <name>Elastic search mapping parent</name>
@@ -23,7 +23,7 @@
     <!-- Logging -->
     <log4j.version>2.8.2</log4j.version>
     <slf4j.version>1.7.24</slf4j.version>
-	
+
         <java.version>1.8</java.version>
         <maven.compiler.version>2.3.2</maven.compiler.version>
     </properties>