diff --git a/fj-doc-playground-quarkus/pom.xml b/fj-doc-playground-quarkus/pom.xml
index 61a3e123d..32c97a4cb 100644
--- a/fj-doc-playground-quarkus/pom.xml
+++ b/fj-doc-playground-quarkus/pom.xml
@@ -62,6 +62,10 @@
 		    <groupId>io.quarkus</groupId>
 		    <artifactId>quarkus-webjars-locator</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>io.quarkus</groupId>
+			<artifactId>quarkus-hibernate-validator</artifactId>
+		</dependency>
 		<dependency>
 			<groupId>io.quarkus</groupId>
 			<artifactId>quarkus-junit5</artifactId>
diff --git a/fj-doc-playground-quarkus/src/main/java/org/fugerit/java/doc/playground/init/ProjectInitInput.java b/fj-doc-playground-quarkus/src/main/java/org/fugerit/java/doc/playground/init/ProjectInitInput.java
index 071b743ac..30ab9451d 100644
--- a/fj-doc-playground-quarkus/src/main/java/org/fugerit/java/doc/playground/init/ProjectInitInput.java
+++ b/fj-doc-playground-quarkus/src/main/java/org/fugerit/java/doc/playground/init/ProjectInitInput.java
@@ -1,5 +1,8 @@
 package org.fugerit.java.doc.playground.init;
 
+import jakarta.validation.constraints.Max;
+import jakarta.validation.constraints.Min;
+import jakarta.validation.constraints.Pattern;
 import lombok.Getter;
 import lombok.Setter;
 
@@ -7,11 +10,21 @@
 
 public class ProjectInitInput {
 
+    @Pattern( regexp = "[A-Za-z0-9-\\.]+", flags = Pattern.Flag.DOTALL )
     @Getter @Setter private String groupId;
+
+    @Pattern( regexp = "[A-Za-z0-9-]+", flags = Pattern.Flag.DOTALL )
     @Getter @Setter private String artifactId;
+
+    @Pattern( regexp = "[A-Za-z0-9-\\.]+", flags = Pattern.Flag.DOTALL )
     @Getter @Setter private String projectVersion;
-    @Getter @Setter private String javaVersion;
+
+    @Min( 8 ) @Max( 21 )
+    @Getter @Setter private Long javaVersion;
+
+    @Pattern( regexp = "[A-Za-z0-9-\\.]+", flags = Pattern.Flag.DOTALL )
     @Getter @Setter private String venusVersion;
+
     @Getter @Setter private List<String> extensionList;
 
 }
diff --git a/fj-doc-playground-quarkus/src/main/java/org/fugerit/java/doc/playground/init/ProjectRest.java b/fj-doc-playground-quarkus/src/main/java/org/fugerit/java/doc/playground/init/ProjectRest.java
index 51fe58ca0..b797d6972 100644
--- a/fj-doc-playground-quarkus/src/main/java/org/fugerit/java/doc/playground/init/ProjectRest.java
+++ b/fj-doc-playground-quarkus/src/main/java/org/fugerit/java/doc/playground/init/ProjectRest.java
@@ -1,6 +1,7 @@
 package org.fugerit.java.doc.playground.init;
 
 import jakarta.enterprise.context.ApplicationScoped;
+import jakarta.validation.Valid;
 import jakarta.ws.rs.*;
 import jakarta.ws.rs.core.MediaType;
 import jakarta.ws.rs.core.Response;
@@ -18,9 +19,7 @@
 import org.fugerit.java.doc.project.facade.ModuleFacade;
 
 import java.io.*;
-import java.nio.file.Files;
 import java.util.Base64;
-import java.util.UUID;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipOutputStream;
 
@@ -54,30 +53,28 @@ private File initConfigWorker( String base ) {
     @Consumes(MediaType.APPLICATION_JSON)
     @Produces(MediaType.APPLICATION_JSON)
     @Path("/init")
-    public Response init( ProjectInitInput input) {
+    public Response init( @Valid ProjectInitInput data ) {
         return RestHelper.defaultHandle( () -> {
-            // check artifact id naming
-            if ( !input.getArtifactId().matches( "[A-Za-z0-9-]+" ) ) {
-                return Response.status( Response.Status.BAD_REQUEST ).build();
-            }
             long time = System.currentTimeMillis();
             ProjectInitOutput output = new ProjectInitOutput();
+            String groupIdData = data.getGroupId();
+            String artifactIdData = data.getArtifactId();
             try ( ByteArrayOutputStream buffer = new ByteArrayOutputStream() ) {
-                File projectDir = this.initConfigWorker( input.getArtifactId() );
+                File projectDir = this.initConfigWorker( artifactIdData );
                 checkIfInTempFolder( projectDir );    // security check
-                File realDir = new File( projectDir, input.getArtifactId() );
+                File realDir = new File( projectDir, artifactIdData );
                 checkIfInTempFolder( realDir );    // security check
                 log.info( "project init folder : {}", realDir.getAbsolutePath() );
                 MojoInit mojoInit = new MojoInit() {
                     @Override
                     public void execute() throws MojoExecutionException, MojoFailureException {
                         this.baseInitFolder = projectDir.getAbsolutePath();
-                        this.projectVersion = input.getProjectVersion();
-                        this.groupId = input.getGroupId();
-                        this.version = input.getVenusVersion();
-                        this.artifactId = input.getArtifactId();
-                        this.javaRelease = input.getJavaVersion();
-                        this.extensions = StringUtils.concat( ",", input.getExtensionList() );
+                        this.projectVersion = data.getProjectVersion();
+                        this.groupId = groupIdData;
+                        this.version = data.getVenusVersion();
+                        this.artifactId = artifactIdData;
+                        this.javaRelease = String.valueOf( data.getJavaVersion() );
+                        this.extensions = StringUtils.concat( ",", data.getExtensionList() );
                         this.addDocFacade = true;
                         this.force = true;
                         this.addVerifyPlugin = true;
@@ -86,13 +83,13 @@ public void execute() throws MojoExecutionException, MojoFailureException {
                 };
                 mojoInit.execute();
                 zipFolder( realDir, buffer );
-                byte[] data = buffer.toByteArray();
-                output.setContent( Base64.getEncoder().encodeToString( data ) );
-                log.info( "zip size : {}", data.length );
+                byte[] byteArray = buffer.toByteArray();
+                output.setContent( Base64.getEncoder().encodeToString( byteArray ) );
+                log.info( "zip size : {}", byteArray.length );
                 checkIfInTempFolder( projectDir );    // security check
                 FileUtils.deleteDirectory( projectDir );
                 output.setMessage( String.format( "Project init OK : %s:%s, time:%s",
-                        input.getGroupId(), input.getArtifactId(),
+                        groupIdData, artifactIdData,
                         CheckpointUtils.formatTimeDiffMillis( time , System.currentTimeMillis() ) ) );
             } catch ( Exception e ) {
                 log.warn( "Error generating document : "+e , e );
diff --git a/fj-doc-playground-quarkus/src/test/java/org/fugerit/java/doc/playground/InitRestTest.java b/fj-doc-playground-quarkus/src/test/java/org/fugerit/java/doc/playground/InitRestTest.java
index 1157fc37a..f832c0357 100644
--- a/fj-doc-playground-quarkus/src/test/java/org/fugerit/java/doc/playground/InitRestTest.java
+++ b/fj-doc-playground-quarkus/src/test/java/org/fugerit/java/doc/playground/InitRestTest.java
@@ -45,6 +45,7 @@ void testInit() {
 		this.testWorker( "/project/init", "request/payload/init/init_ok_1.json", 200 );
 		this.testWorker( "/project/init", "request/payload/init/init_ko_1.json", 200 );
 		this.testWorker( "/project/init", "request/payload/init/init_ko_2.json", 400 );
+		this.testWorker( "/project/init", "request/payload/init/init_ko_3.json", 400 );
 		Assertions.assertTrue( Boolean.TRUE );  // the condition is actually checked by rest assured
     }
 
diff --git a/fj-doc-playground-quarkus/src/test/resources/request/payload/init/init_ko_3.json b/fj-doc-playground-quarkus/src/test/resources/request/payload/init/init_ko_3.json
new file mode 100644
index 000000000..cf9ebe46d
--- /dev/null
+++ b/fj-doc-playground-quarkus/src/test/resources/request/payload/init/init_ko_3.json
@@ -0,0 +1 @@
+{"groupId":"../org.fugerit.java.demo","artifactId":"fugerit-doc-demo","projectVersion":"1.0.0-SNAPSHOT","javaVersion":"21","venusVersion":"8.7.4"}
\ No newline at end of file