diff --git a/client/pom.xml b/client/pom.xml
index 3a0810318..b40e846bb 100644
--- a/client/pom.xml
+++ b/client/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <groupId>io.github.a2asdk</groupId>
         <artifactId>a2a-java-sdk-parent</artifactId>
-        <version>0.2.4-SNAPSHOT</version>
+        <version>0.2.3.Alpha2-SNAPSHOT</version>
     </parent>
     <artifactId>a2a-java-sdk-client</artifactId>
 
diff --git a/common/pom.xml b/common/pom.xml
index faea6f033..fc527942d 100644
--- a/common/pom.xml
+++ b/common/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <groupId>io.github.a2asdk</groupId>
         <artifactId>a2a-java-sdk-parent</artifactId>
-        <version>0.2.4-SNAPSHOT</version>
+        <version>0.2.3.Alpha2-SNAPSHOT</version>
     </parent>
     <artifactId>a2a-java-sdk-common</artifactId>
 
diff --git a/examples/helloworld/client/pom.xml b/examples/helloworld/client/pom.xml
index 641d1012d..b3222a3d7 100644
--- a/examples/helloworld/client/pom.xml
+++ b/examples/helloworld/client/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <groupId>io.github.a2asdk</groupId>
         <artifactId>a2a-java-sdk-examples-parent</artifactId>
-        <version>0.2.4-SNAPSHOT</version>
+        <version>0.2.3.Alpha2-SNAPSHOT</version>
     </parent>
 
     <artifactId>a2a-java-sdk-examples-client</artifactId>
diff --git a/examples/helloworld/client/src/main/java/io/a2a/examples/helloworld/HelloWorldRunner.java b/examples/helloworld/client/src/main/java/io/a2a/examples/helloworld/HelloWorldRunner.java
index 10544f43c..cad6fe2b5 100644
--- a/examples/helloworld/client/src/main/java/io/a2a/examples/helloworld/HelloWorldRunner.java
+++ b/examples/helloworld/client/src/main/java/io/a2a/examples/helloworld/HelloWorldRunner.java
@@ -1,5 +1,5 @@
 ///usr/bin/env jbang "$0" "$@" ; exit $?
-//DEPS io.github.a2asdk:a2a-java-sdk-client:0.2.4-SNAPSHOT
+//DEPS io.github.a2asdk:a2a-java-sdk-client:0.2.3.Alpha2-SNAPSHOT
 //SOURCES HelloWorldClient.java
 
 /**
diff --git a/examples/helloworld/pom.xml b/examples/helloworld/pom.xml
index de38c1ad1..9571ad591 100644
--- a/examples/helloworld/pom.xml
+++ b/examples/helloworld/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <groupId>io.github.a2asdk</groupId>
         <artifactId>a2a-java-sdk-parent</artifactId>
-        <version>0.2.4-SNAPSHOT</version>
+        <version>0.2.3.Alpha2-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/examples/helloworld/server/pom.xml b/examples/helloworld/server/pom.xml
index 03fcee860..6ed56b358 100644
--- a/examples/helloworld/server/pom.xml
+++ b/examples/helloworld/server/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <groupId>io.github.a2asdk</groupId>
         <artifactId>a2a-java-sdk-examples-parent</artifactId>
-        <version>0.2.4-SNAPSHOT</version>
+        <version>0.2.3.Alpha2-SNAPSHOT</version>
     </parent>
 
     <artifactId>a2a-java-sdk-examples-server</artifactId>
diff --git a/pom.xml b/pom.xml
index 620416977..eb4890269 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>io.github.a2asdk</groupId>
     <artifactId>a2a-java-sdk-parent</artifactId>
-    <version>0.2.4-SNAPSHOT</version>
+    <version>0.2.3.Alpha2-SNAPSHOT</version>
 
     <packaging>pom</packaging>
 
@@ -43,6 +43,8 @@
         <maven-jar-plugin.version>3.4.2</maven-jar-plugin.version>
         <maven-source-plugin.version>3.3.1</maven-source-plugin.version>
         <maven-surefire-plugin.version>3.1.2</maven-surefire-plugin.version>
+        <maven-javadoc-plugin.version>3.8.0</maven-javadoc-plugin.version>
+        <maven-gpg-plugin.version>3.2.4</maven-gpg-plugin.version>
         <sonatype-central-publishing-plugin.version>0.8.0</sonatype-central-publishing-plugin.version>
         <jackson.version>2.17.0</jackson.version>
         <jakarta.enterprise.cdi-api.version>4.1.0</jakarta.enterprise.cdi-api.version>
@@ -60,7 +62,6 @@
 
         <!-- Redirect test output to file -->
         <maven.test.redirectTestOutputToFile>true</maven.test.redirectTestOutputToFile>
-        <maven-javadoc-plugin.version>3.8.0</maven-javadoc-plugin.version>
     </properties>
 
     <dependencyManagement>
@@ -233,6 +234,20 @@
                         </execution>
                     </executions>
                 </plugin>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-gpg-plugin</artifactId>
+                    <version>${maven-gpg-plugin.version}</version>
+                    <executions>
+                        <execution>
+                            <id>sign-artifacts</id>
+                            <phase>verify</phase>
+                            <goals>
+                                <goal>sign</goal>
+                            </goals>
+                            </execution>
+                    </executions>
+                </plugin>
             </plugins>
         </pluginManagement>
         <plugins>
@@ -275,27 +290,14 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-source-plugin</artifactId>
-                        <executions>
-                            <execution>
-                                <id>attach-sources</id>
-                                <goals>
-                                    <goal>jar-no-fork</goal>
-                                </goals>
-                            </execution>
-                        </executions>
                     </plugin>
-
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-javadoc-plugin</artifactId>
-                        <executions>
-                            <execution>
-                                <id>attach-javadocs</id>
-                                <goals>
-                                    <goal>jar</goal>
-                                </goals>
-                            </execution>
-                        </executions>
+                    </plugin>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-gpg-plugin</artifactId>
                     </plugin>
                 </plugins>
             </build>
diff --git a/sdk-jakarta/pom.xml b/sdk-jakarta/pom.xml
index d01235686..2cad1a6f6 100644
--- a/sdk-jakarta/pom.xml
+++ b/sdk-jakarta/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <groupId>io.github.a2asdk</groupId>
         <artifactId>a2a-java-sdk-parent</artifactId>
-        <version>0.2.4-SNAPSHOT</version>
+        <version>0.2.3.Alpha2-SNAPSHOT</version>
     </parent>
     <artifactId>a2a-java-sdk-server-jakarta</artifactId>
 
diff --git a/sdk-quarkus/pom.xml b/sdk-quarkus/pom.xml
index 1e2410278..19710cb76 100644
--- a/sdk-quarkus/pom.xml
+++ b/sdk-quarkus/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <groupId>io.github.a2asdk</groupId>
         <artifactId>a2a-java-sdk-parent</artifactId>
-        <version>0.2.4-SNAPSHOT</version>
+        <version>0.2.3.Alpha2-SNAPSHOT</version>
     </parent>
     <artifactId>a2a-java-sdk-server-quarkus</artifactId>
 
diff --git a/sdk-server-common/pom.xml b/sdk-server-common/pom.xml
index 7ae5e1835..3155cbc17 100644
--- a/sdk-server-common/pom.xml
+++ b/sdk-server-common/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <groupId>io.github.a2asdk</groupId>
         <artifactId>a2a-java-sdk-parent</artifactId>
-        <version>0.2.4-SNAPSHOT</version>
+        <version>0.2.3.Alpha2-SNAPSHOT</version>
     </parent>
     <artifactId>a2a-java-sdk-server-common</artifactId>
 
diff --git a/spec/pom.xml b/spec/pom.xml
index 7de1871d2..9c03159e7 100644
--- a/spec/pom.xml
+++ b/spec/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <groupId>io.github.a2asdk</groupId>
         <artifactId>a2a-java-sdk-parent</artifactId>
-        <version>0.2.4-SNAPSHOT</version>
+        <version>0.2.3.Alpha2-SNAPSHOT</version>
     </parent>
     <artifactId>a2a-java-sdk-spec</artifactId>
 
diff --git a/tck/pom.xml b/tck/pom.xml
index 45440c86e..f233ec605 100644
--- a/tck/pom.xml
+++ b/tck/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <groupId>io.github.a2asdk</groupId>
         <artifactId>a2a-java-sdk-parent</artifactId>
-        <version>0.2.4-SNAPSHOT</version>
+        <version>0.2.3.Alpha2-SNAPSHOT</version>
     </parent>
 
     <artifactId>a2a-tck-server</artifactId>
diff --git a/tests/server-common/pom.xml b/tests/server-common/pom.xml
index 6bdd88f5d..7ffdb2487 100644
--- a/tests/server-common/pom.xml
+++ b/tests/server-common/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <groupId>io.github.a2asdk</groupId>
         <artifactId>a2a-java-sdk-parent</artifactId>
-        <version>0.2.4-SNAPSHOT</version>
+        <version>0.2.3.Alpha2-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <artifactId>a2a-java-sdk-tests-server-common</artifactId>