diff --git a/launcher/src/main/java/io/peasoup/inv/AppLauncher.java b/launcher/src/main/java/io/peasoup/inv/AppLauncher.java
index 7409244..89604d6 100644
--- a/launcher/src/main/java/io/peasoup/inv/AppLauncher.java
+++ b/launcher/src/main/java/io/peasoup/inv/AppLauncher.java
@@ -64,6 +64,7 @@ public static void main(String[] args) throws URISyntaxException, IOException, I
         // Create commands
         List<String> commands = new ArrayList<>();
         commands.add("java");
+        commands.add("-Djava.system.class.loader=groovy.lang.GroovyClassLoader");
         commands.add("-cp");
         commands.add(String.join(delimiter, urls));
         commands.add("io.peasoup.inv.Main");