diff --git a/pom.xml b/pom.xml
index 03e41f7..4c98298 100755
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
     <groupId>org.orbisgis</groupId>
     <artifactId>demat</artifactId>
     <version>1.0.0-SNAPSHOT</version>
-    <packaging>jar</packaging>
+    <packaging>pom</packaging>
     <description>Demat is breton word to said "Hello". Demat is library to run Vega-lite specifications.</description>
     <!-- Properties -->
     <properties>
@@ -26,8 +26,11 @@
 
         <!-- Plugins versions -->
         <exec-maven-version>3.0.0</exec-maven-version>
+        <gmaven-version>3.0.2</gmaven-version>
         <maven-assembly-version>3.3.0</maven-assembly-version>
         <maven-bundle-version>5.1.2</maven-bundle-version>
+        <maven-clean-version>3.1.0</maven-clean-version>
+        <maven-compiler-version>3.8.1</maven-compiler-version>
         <maven-enforcer-version>3.0.0</maven-enforcer-version>
         <maven-gpg-plugin-version>3.0.1</maven-gpg-plugin-version>
         <maven-jar-version>3.2.0</maven-jar-version>
@@ -387,8 +390,8 @@
     <url>https://github.com/ebocher/demat</url>
     <licenses>
         <license>
-            <name>The GNU General Public License, Version 3.0</name>
-            <url>http://www.gnu.org/licenses/gpl-3.0.txt</url>
+            <name>GNU Lesser General Public License (LGPLV3+)</name>
+            <url>http://www.gnu.org/licenses/lgpl-3.0.html</url>
             <distribution>repo</distribution>
         </license>
     </licenses>
diff --git a/src/main/java/org/orbisgis/demat/SvgRasterizer.java b/src/main/java/org/orbisgis/demat/SvgRasterizer.java
index d311e45..1d86439 100755
--- a/src/main/java/org/orbisgis/demat/SvgRasterizer.java
+++ b/src/main/java/org/orbisgis/demat/SvgRasterizer.java
@@ -58,32 +58,30 @@
 import java.net.URL;
 import java.util.Map;
 
-import static java.awt.RenderingHints.*;
-import static java.awt.image.BufferedImage.TYPE_INT_ARGB;
 
 /**
  * @author Erwan Bocher, CNRS 2023-2024
  */
 public class SvgRasterizer {
     public final static Map<Object, Object> RENDERING_HINTS = Map.of(
-            KEY_ANTIALIASING,
-            VALUE_ANTIALIAS_ON,
-            KEY_ALPHA_INTERPOLATION,
-            VALUE_ALPHA_INTERPOLATION_QUALITY,
-            KEY_COLOR_RENDERING,
-            VALUE_COLOR_RENDER_QUALITY,
-            KEY_DITHERING,
-            VALUE_DITHER_DISABLE,
-            KEY_FRACTIONALMETRICS,
-            VALUE_FRACTIONALMETRICS_ON,
-            KEY_INTERPOLATION,
-            VALUE_INTERPOLATION_NEAREST_NEIGHBOR,
-            KEY_RENDERING,
-            VALUE_RENDER_QUALITY,
-            KEY_STROKE_CONTROL,
-            VALUE_STROKE_PURE,
-            KEY_TEXT_ANTIALIASING,
-            VALUE_TEXT_ANTIALIAS_ON
+            RenderingHints.KEY_ANTIALIASING,
+            RenderingHints.VALUE_ANTIALIAS_ON,
+            RenderingHints.KEY_ALPHA_INTERPOLATION,
+            RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY,
+            RenderingHints.KEY_COLOR_RENDERING,
+            RenderingHints.VALUE_COLOR_RENDER_QUALITY,
+            RenderingHints.KEY_DITHERING,
+            RenderingHints.VALUE_DITHER_DISABLE,
+            RenderingHints.KEY_FRACTIONALMETRICS,
+            RenderingHints.VALUE_FRACTIONALMETRICS_ON,
+            RenderingHints.KEY_INTERPOLATION,
+            RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR,
+            RenderingHints.KEY_RENDERING,
+            RenderingHints.VALUE_RENDER_QUALITY,
+            RenderingHints.KEY_STROKE_CONTROL,
+            RenderingHints.VALUE_STROKE_PURE,
+            RenderingHints.KEY_TEXT_ANTIALIASING,
+            RenderingHints.VALUE_TEXT_ANTIALIAS_ON
     );
 
     private final static SVGUniverse sRenderer = new SVGUniverse();
@@ -108,7 +106,7 @@ public BufferedImage rasterize(final InputStream path, final float ratio )
         final int wScaled = (int) scaled.getWidth();
         final int hScaled = (int) scaled.getHeight();
 
-        final BufferedImage image = new BufferedImage( wScaled, hScaled, TYPE_INT_ARGB );
+        final BufferedImage image = new BufferedImage( wScaled, hScaled, BufferedImage.TYPE_INT_ARGB );
 
         final Graphics2D g = image.createGraphics();
         g.setRenderingHints( RENDERING_HINTS );