diff --git a/a2a/pom.xml b/a2a/pom.xml
index 35b0651bc..f7f1ec3d1 100644
--- a/a2a/pom.xml
+++ b/a2a/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-parent</artifactId>
-    <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>0.4.0-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
   </parent>
 
   <artifactId>google-adk-a2a</artifactId>
diff --git a/a2a/webservice/pom.xml b/a2a/webservice/pom.xml
index dd723aa7e..5258853bd 100644
--- a/a2a/webservice/pom.xml
+++ b/a2a/webservice/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-parent</artifactId>
-    <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>0.4.0-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
   </parent>
 
   <artifactId>google-adk-a2a-webservice</artifactId>
diff --git a/contrib/langchain4j/pom.xml b/contrib/langchain4j/pom.xml
index 9023d15e0..5e1b8d894 100644
--- a/contrib/langchain4j/pom.xml
+++ b/contrib/langchain4j/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-parent</artifactId>
-        <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>0.4.0-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/contrib/samples/a2a_basic/pom.xml b/contrib/samples/a2a_basic/pom.xml
index 59e10c375..5132c19ed 100644
--- a/contrib/samples/a2a_basic/pom.xml
+++ b/contrib/samples/a2a_basic/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-samples</artifactId>
-    <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>0.4.0-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
     <relativePath>..</relativePath>
   </parent>
 
diff --git a/contrib/samples/a2a_remote/pom.xml b/contrib/samples/a2a_remote/pom.xml
index ee65bddec..92ca0ea2c 100644
--- a/contrib/samples/a2a_remote/pom.xml
+++ b/contrib/samples/a2a_remote/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-parent</artifactId>
-    <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>0.4.0-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
   </parent>
 
   <artifactId>google-adk-sample-a2a-remote</artifactId>
diff --git a/contrib/samples/configagent/pom.xml b/contrib/samples/configagent/pom.xml
index 510270c55..21c41b304 100644
--- a/contrib/samples/configagent/pom.xml
+++ b/contrib/samples/configagent/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-samples</artifactId>
-        <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>0.4.0-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>..</relativePath>
     </parent>
 
diff --git a/contrib/samples/helloworld/pom.xml b/contrib/samples/helloworld/pom.xml
index 96b505009..7cba8e896 100644
--- a/contrib/samples/helloworld/pom.xml
+++ b/contrib/samples/helloworld/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-samples</artifactId>
-        <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>0.4.0-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>..</relativePath>
     </parent>
 
diff --git a/contrib/samples/mcpfilesystem/pom.xml b/contrib/samples/mcpfilesystem/pom.xml
index f81910ae0..15f6ca314 100644
--- a/contrib/samples/mcpfilesystem/pom.xml
+++ b/contrib/samples/mcpfilesystem/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-parent</artifactId>
-        <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>0.4.0-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../../..</relativePath>
     </parent>
 
diff --git a/contrib/samples/pom.xml b/contrib/samples/pom.xml
index 5e442daf2..b9f32f0f6 100644
--- a/contrib/samples/pom.xml
+++ b/contrib/samples/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-parent</artifactId>
-    <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>0.4.0-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
     <relativePath>../..</relativePath>
   </parent>
 
diff --git a/contrib/spring-ai/pom.xml b/contrib/spring-ai/pom.xml
index cd8c2a4ae..1b7522a0f 100644
--- a/contrib/spring-ai/pom.xml
+++ b/contrib/spring-ai/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-parent</artifactId>
-        <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>0.4.0-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/core/pom.xml b/core/pom.xml
index 1d681374e..867de30c7 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-parent</artifactId>
-    <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>0.4.0-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
   </parent>
 
   <artifactId>google-adk</artifactId>
diff --git a/dev/pom.xml b/dev/pom.xml
index f646b130f..c2d5aae99 100644
--- a/dev/pom.xml
+++ b/dev/pom.xml
@@ -18,7 +18,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-parent</artifactId>
-    <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>0.4.0-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
   </parent>
 
   <artifactId>google-adk-dev</artifactId>
diff --git a/maven_plugin/pom.xml b/maven_plugin/pom.xml
index f525f1c29..457275be5 100644
--- a/maven_plugin/pom.xml
+++ b/maven_plugin/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-parent</artifactId>
-        <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>0.4.0-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/pom.xml b/pom.xml
index ad441f6f3..dc734946f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -17,7 +17,7 @@
 
   <groupId>com.google.adk</groupId>
   <artifactId>google-adk-parent</artifactId>
-  <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+  <version>0.4.0-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
   <packaging>pom</packaging>
 
   <name>Google Agent Development Kit Maven Parent POM</name>
diff --git a/tutorials/city-time-weather/pom.xml b/tutorials/city-time-weather/pom.xml
index 85d3e391e..1a20f42b0 100644
--- a/tutorials/city-time-weather/pom.xml
+++ b/tutorials/city-time-weather/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-parent</artifactId>
-    <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>0.4.0-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/tutorials/live-audio-single-agent/pom.xml b/tutorials/live-audio-single-agent/pom.xml
index 7c08cd755..6e5a6fad6 100644
--- a/tutorials/live-audio-single-agent/pom.xml
+++ b/tutorials/live-audio-single-agent/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-parent</artifactId>
-    <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>0.4.0-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
     <relativePath>../../pom.xml</relativePath>
   </parent>