diff --git a/server/application-server/src/main/java/de/tum/in/www1/hephaestus/scheduler/GitHubDataSyncService.java b/server/application-server/src/main/java/de/tum/in/www1/hephaestus/scheduler/GitHubDataSyncService.java
index 432a113a..3b2cd3f1 100644
--- a/server/application-server/src/main/java/de/tum/in/www1/hephaestus/scheduler/GitHubDataSyncService.java
+++ b/server/application-server/src/main/java/de/tum/in/www1/hephaestus/scheduler/GitHubDataSyncService.java
@@ -49,7 +49,9 @@
 import de.tum.in.www1.hephaestus.codereview.user.User;
 import de.tum.in.www1.hephaestus.codereview.user.UserConverter;
 import de.tum.in.www1.hephaestus.codereview.user.UserRepository;
+import jakarta.transaction.Transactional;
 
+@Transactional
 @Service
 public class GitHubDataSyncService {
     private static final Logger logger = LoggerFactory.getLogger(GitHubDataSyncService.class);