diff --git a/src/main/java/de/uni_passau/fim/PADAS/group3/DataDash/model/CategoryRepository.java b/src/main/java/de/uni_passau/fim/PADAS/group3/DataDash/model/CategoryRepository.java
index 4b179ad..a0b67e5 100644
--- a/src/main/java/de/uni_passau/fim/PADAS/group3/DataDash/model/CategoryRepository.java
+++ b/src/main/java/de/uni_passau/fim/PADAS/group3/DataDash/model/CategoryRepository.java
@@ -11,8 +11,10 @@ public interface CategoryRepository extends JpaRepository<Category, UUID>{
 
     Category getCategoryById(UUID id);
 
+    @SuppressWarnings("null")
     List<Category> findAll();
     List<Category> findByName(String name);
+    @SuppressWarnings("null")
     Optional<Category> findById(UUID id);
 
 }