diff --git a/mcp/pom.xml b/mcp/pom.xml
index dcdba17..6bb5e13 100644
--- a/mcp/pom.xml
+++ b/mcp/pom.xml
@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>org.springframework.experimental</groupId>
 		<artifactId>mcp-parent</artifactId>
-		<version>0.3.1</version>
+		<version>0.4.0-SNAPSHOT</version>
 	</parent>
 	<artifactId>mcp</artifactId>
 	<packaging>jar</packaging>
diff --git a/pom.xml b/pom.xml
index 3df66b0..383a2d2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
 	<groupId>org.springframework.experimental</groupId>
 	<artifactId>mcp-parent</artifactId>
-	<version>0.3.1</version>
+	<version>0.4.0-SNAPSHOT</version>
 
 	<packaging>pom</packaging>
 	<url>https://github.com/spring-projects-experimental/spring-ai-mcp</url>
diff --git a/spring-ai-mcp-sample/pom.xml b/spring-ai-mcp-sample/pom.xml
index 02ec387..70aa6d8 100644
--- a/spring-ai-mcp-sample/pom.xml
+++ b/spring-ai-mcp-sample/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>org.springframework.experimental</groupId>
         <artifactId>mcp-parent</artifactId>
-        <version>0.3.1</version>
+        <version>0.4.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>spring-ai-mcp-sample</artifactId>
diff --git a/spring-ai-mcp/pom.xml b/spring-ai-mcp/pom.xml
index fe62bbe..67caf72 100644
--- a/spring-ai-mcp/pom.xml
+++ b/spring-ai-mcp/pom.xml
@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>org.springframework.experimental</groupId>
 		<artifactId>mcp-parent</artifactId>
-		<version>0.3.1</version>
+		<version>0.4.0-SNAPSHOT</version>
 	</parent>
 	<artifactId>spring-ai-mcp</artifactId>
 	<name>Spring AI MCP</name>