diff --git a/CHANGELOG.md b/CHANGELOG.md
index a6c5786..352def5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 # Changelog for storage-manager-core
 
+## [v4.0.0-SNAPSHOT]
+  * compatible with s3 storage backend
 
 ## [v2.13.0-SNAPSHOT]
   * add close operation on IClient interface
diff --git a/pom.xml b/pom.xml
index 4aed748..c60f517 100644
--- a/pom.xml
+++ b/pom.xml
@@ -8,7 +8,7 @@
 	</parent>
   <groupId>org.gcube.contentmanagement</groupId>
   <artifactId>storage-manager-core</artifactId>
-  <version>3.1.0-SNAPSHOT</version>
+  <version>4.0.0-SNAPSHOT</version>
 <!--   <properties> -->
 <!--   		<distroDirectory>${project.basedir}/distro</distroDirectory> -->
 <!--   </properties> -->