diff --git a/pom.xml b/pom.xml
index e9455c5..ea65d55 100644
--- a/pom.xml
+++ b/pom.xml
@@ -44,8 +44,8 @@
     </dependency>
     <dependency>
       <groupId>org.codehaus.groovy</groupId>
-      <artifactId>groovy</artifactId>
-      <version>1.6.5</version>
+      <artifactId>groovy-xml</artifactId>
+      <version>3.0.7</version>
     </dependency>
   </dependencies>
 
@@ -67,6 +67,14 @@
           </execution>
         </executions>
       </plugin>
+      <plugin>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>3.1</version>
+        <configuration>
+          <source>1.8</source>
+          <target>1.8</target>
+        </configuration>
+      </plugin>
     </plugins>
   </build>
 </project>
diff --git a/src/main/java/com/cloudbees/maven/license/ProcessMojo.java b/src/main/java/com/cloudbees/maven/license/ProcessMojo.java
index 846fac8..48d4e07 100644
--- a/src/main/java/com/cloudbees/maven/license/ProcessMojo.java
+++ b/src/main/java/com/cloudbees/maven/license/ProcessMojo.java
@@ -32,6 +32,7 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.net.URISyntaxException;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Iterator;
@@ -146,11 +147,21 @@ public void execute() throws MojoExecutionException {
             }
         }
 
-        if (generateLicenseXml!=null)
-            comp.add((LicenseScript) shell.parse(getClass().getResourceAsStream("xmlgen.groovy"),"xmlgen.groovy"));
+        if (generateLicenseXml!=null) {
+            try {
+                comp.add((LicenseScript) shell.parse(getClass().getResource("xmlgen.groovy").toURI()));
+            } catch (URISyntaxException | IOException e) {
+                throw new MojoExecutionException("Failed to retrieve xmlgen.groovy", e);
+            }
+        }
 
-        if (generateLicenseHtml!=null)
-            comp.add((LicenseScript) shell.parse(getClass().getResourceAsStream("htmlgen.groovy"),"htmlgen.groovy"));
+        if (generateLicenseHtml!=null) {
+            try {
+                comp.add((LicenseScript) shell.parse(getClass().getResource("htmlgen.groovy").toURI()));
+            } catch (URISyntaxException | IOException e) {
+                throw new MojoExecutionException("Failed to retrieve htmlgen.groovy", e);
+            }
+        }
 
         if (inlineScript!=null)
             comp.add((LicenseScript)shell.parse(inlineScript,"inlineScript"));