diff --git a/bin/pom.xml b/bin/pom.xml
index 2c4a4e4..26fc9f5 100644
--- a/bin/pom.xml
+++ b/bin/pom.xml
@@ -3,7 +3,7 @@
   <parent>
     <groupId>io.jstach.ezkv</groupId>
     <artifactId>ezkv-maven-parent</artifactId>
-    <version>0.3.0-SNAPSHOT</version>
+    <version>0.4.0-SNAPSHOT</version>
   </parent>
   <artifactId>ezkv-bin</artifactId>
   <name>ezkv-bin</name>
diff --git a/ezkv-boot/pom.xml b/ezkv-boot/pom.xml
index 9bfe17d..7b6071e 100644
--- a/ezkv-boot/pom.xml
+++ b/ezkv-boot/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>io.jstach.ezkv</groupId>
     <artifactId>ezkv-maven-parent</artifactId>
-    <version>0.3.0-SNAPSHOT</version>
+    <version>0.4.0-SNAPSHOT</version>
   </parent>
   <properties>
     <doc.resources>../</doc.resources>
diff --git a/ezkv-dotenv/pom.xml b/ezkv-dotenv/pom.xml
index 772e9b2..71e18cb 100644
--- a/ezkv-dotenv/pom.xml
+++ b/ezkv-dotenv/pom.xml
@@ -3,7 +3,7 @@
   <parent>
     <groupId>io.jstach.ezkv</groupId>
     <artifactId>ezkv-maven-parent</artifactId>
-    <version>0.3.0-SNAPSHOT</version>
+    <version>0.4.0-SNAPSHOT</version>
   </parent>
   <properties>
     <doc.resources>../</doc.resources>
diff --git a/ezkv-json5/pom.xml b/ezkv-json5/pom.xml
index 5c93ad8..87d3bec 100644
--- a/ezkv-json5/pom.xml
+++ b/ezkv-json5/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>io.jstach.ezkv</groupId>
     <artifactId>ezkv-maven-parent</artifactId>
-    <version>0.3.0-SNAPSHOT</version>
+    <version>0.4.0-SNAPSHOT</version>
   </parent>
   <properties>
     <doc.resources>../</doc.resources>
diff --git a/ezkv-kvs/pom.xml b/ezkv-kvs/pom.xml
index 8a89914..c839a4d 100644
--- a/ezkv-kvs/pom.xml
+++ b/ezkv-kvs/pom.xml
@@ -3,7 +3,7 @@
   <parent>
     <groupId>io.jstach.ezkv</groupId>
     <artifactId>ezkv-maven-parent</artifactId>
-    <version>0.3.0-SNAPSHOT</version>
+    <version>0.4.0-SNAPSHOT</version>
   </parent>
   <artifactId>ezkv-kvs</artifactId>
   <properties>
diff --git a/ezkv-maven-plugin/pom.xml b/ezkv-maven-plugin/pom.xml
index b844476..b147409 100644
--- a/ezkv-maven-plugin/pom.xml
+++ b/ezkv-maven-plugin/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>io.jstach.ezkv</groupId>
     <artifactId>ezkv-maven-parent</artifactId>
-    <version>0.3.0-SNAPSHOT</version>
+    <version>0.4.0-SNAPSHOT</version>
   </parent>
   <artifactId>ezkv-maven-plugin</artifactId>
   <packaging>maven-plugin</packaging>
diff --git a/ezkv-xml/pom.xml b/ezkv-xml/pom.xml
index 6f0fb8a..5e4b84e 100644
--- a/ezkv-xml/pom.xml
+++ b/ezkv-xml/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>io.jstach.ezkv</groupId>
     <artifactId>ezkv-maven-parent</artifactId>
-    <version>0.3.0-SNAPSHOT</version>
+    <version>0.4.0-SNAPSHOT</version>
   </parent>
   <artifactId>ezkv-xml</artifactId>
   <properties>
diff --git a/pom.xml b/pom.xml
index a057503..3eee574 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <artifactId>ezkv-maven-parent</artifactId>
   <name>ezkv-maven-parent</name>
   <packaging>pom</packaging>
-  <version>0.3.0-SNAPSHOT</version>
+  <version>0.4.0-SNAPSHOT</version>
   <url>https://github.com/jstachio/ezkv</url>
   <description>
     A non-opinionated Java bootstrapping configuration library that allows
@@ -18,7 +18,7 @@
     <java.version>21</java.version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <metainf-services.version>1.11</metainf-services.version>
-    <project.build.outputTimestamp>1733261111</project.build.outputTimestamp>
+    <project.build.outputTimestamp>1736018355</project.build.outputTimestamp>
     <doc.resources>../</doc.resources>
     <doc.snippets>ezkv/src/test/java</doc.snippets>
     <deploy>snapshot</deploy>
@@ -993,4 +993,4 @@
     <module>ezkv-maven-plugin</module>
     <module>ezkv-xml</module>
   </modules>
-</project>
+</project>
\ No newline at end of file
diff --git a/version.properties b/version.properties
index bc811e6..3fa8100 100644
--- a/version.properties
+++ b/version.properties
@@ -1,2 +1,2 @@
-version=0.2.1
-timestamp=1733944259
+version=0.3.0
+timestamp=1736018370