diff --git a/src/main/java/com/deepdirect/deepwebide_be/repository/service/RepositoryService.java b/src/main/java/com/deepdirect/deepwebide_be/repository/service/RepositoryService.java
index 73923e9..4f19747 100644
--- a/src/main/java/com/deepdirect/deepwebide_be/repository/service/RepositoryService.java
+++ b/src/main/java/com/deepdirect/deepwebide_be/repository/service/RepositoryService.java
@@ -54,6 +54,14 @@ public RepositoryCreateResponse createRepository(RepositoryCreateRequest request
 
         Repository savedRepository = repositoryRepository.save(repository);
 
+        PortRegistry availablePort = portRegistryRepository
+                .findFirstByStatusOrderByPortAsc(PortStatus.AVAILABLE)
+                .orElseThrow(() -> new GlobalException(
+                        ErrorCode.NO_AVAILABLE_PORT
+                ));
+        availablePort.assignToRepository(savedRepository);
+        portRegistryRepository.save(availablePort);
+
         RepositoryMember ownerMember = RepositoryMember.builder()
                 .repository(savedRepository)
                 .user(owner)