-from checksum import ChecksumSerializer
-from vnf_pkg_software_image_info import VnfPackageSoftwareImageInfoSerializer
-from vnf_pkg_artifact_info import VnfPackageArtifactInfoSerializer
-from link import LinkSerializer
+from .checksum import ChecksumSerializer
+from .vnf_pkg_software_image_info import VnfPackageSoftwareImageInfoSerializer
+from .vnf_pkg_artifact_info import VnfPackageArtifactInfoSerializer
+from .link import LinkSerializer