diff -r 3e287f361c7a -r 833e0385572a src/main/java/de/uapcore/lightpit/entities/Version.java
--- a/src/main/java/de/uapcore/lightpit/entities/Version.java	Sun May 17 16:38:04 2020 +0200
+++ b/src/main/java/de/uapcore/lightpit/entities/Version.java	Mon May 18 21:05:57 2020 +0200
@@ -30,7 +30,7 @@
 
 import java.util.Objects;
 
-public class Version implements Comparable<Version> {
+public final class Version implements Comparable<Version> {
 
     private final int id;
     private final Project project;