diff --git a/BauSystem/BauSystem_Main/src/de/steamwar/bausystem/BauSystem.java b/BauSystem/BauSystem_Main/src/de/steamwar/bausystem/BauSystem.java
index e0e4bb13..b37e8e8b 100644
--- a/BauSystem/BauSystem_Main/src/de/steamwar/bausystem/BauSystem.java
+++ b/BauSystem/BauSystem_Main/src/de/steamwar/bausystem/BauSystem.java
@@ -115,9 +115,12 @@ public class BauSystem extends JavaPlugin implements Listener {
                 .map(s -> {
                     try {
                         return Class.forName(s, false, BauSystem.class.getClassLoader());
-                    } catch (ClassNotFoundException e) {
-                        Bukkit.shutdown();
-                        throw new SecurityException(e.getMessage(), e);
+                    } catch (ClassNotFoundException | NoClassDefFoundError e) {
+                        if (e.getMessage().equals(s)) {
+                            Bukkit.shutdown();
+                            throw new SecurityException(e.getMessage(), e);
+                        }
+                        return null;
                     }
                 })
                 .filter(Objects::nonNull)