diff --git a/dledger/pom.xml b/dledger/pom.xml
index bb519545..51a2ef52 100644
--- a/dledger/pom.xml
+++ b/dledger/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <artifactId>dledger-all</artifactId>
         <groupId>io.openmessaging.storage</groupId>
-        <version>0.3.3-SNAPSHOT</version>
+        <version>0.4.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/example/pom.xml b/example/pom.xml
index 80a8bfa5..fd7a1a84 100644
--- a/example/pom.xml
+++ b/example/pom.xml
@@ -1,12 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<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>io.openmessaging.storage</groupId>
         <artifactId>dledger-all</artifactId>
-        <version>0.3.3-SNAPSHOT</version>
+        <version>0.4.0</version>
     </parent>
 
     <artifactId>dledger-example</artifactId>
diff --git a/pom.xml b/pom.xml
index 36729679..3d55b82d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -16,8 +16,7 @@
   ~ 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>
@@ -28,7 +27,7 @@
 
     <groupId>io.openmessaging.storage</groupId>
     <artifactId>dledger-all</artifactId>
-    <version>0.3.3-SNAPSHOT</version>
+    <version>0.4.0</version>
 
     <packaging>pom</packaging>
 
diff --git a/proxy/pom.xml b/proxy/pom.xml
index 14db2c0e..5bb49f83 100644
--- a/proxy/pom.xml
+++ b/proxy/pom.xml
@@ -2,7 +2,7 @@
     <parent>
         <artifactId>dledger-all</artifactId>
         <groupId>io.openmessaging.storage</groupId>
-        <version>0.3.3-SNAPSHOT</version>
+        <version>0.4.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>