diff --git a/backoffice/utils/remote_resource.py b/backoffice/utils/remote_resource.py
index 594ad99c..cd162989 100644
--- a/backoffice/utils/remote_resource.py
+++ b/backoffice/utils/remote_resource.py
@@ -253,7 +253,7 @@ def publish(self) -> PublishedVersion:
         else:
             next_version = max(map(int, versions)) + 1
 
-        logger.debug("Publishing {} as version {}", self.folder, next_version)
+        logger.debug("Publishing {} as version nr {}", self.folder, next_version)
 
         assert next_version not in versions, (next_version, versions)
 
@@ -262,7 +262,7 @@ def publish(self) -> PublishedVersion:
         rdf_data = self.client.load_file(staged_rdf_path)
         rdf = yaml.load(rdf_data)
 
-        sem_ver = rdf.get("sem_ver")
+        sem_ver = rdf.get("version")
         if sem_ver is not None and sem_ver in {v["sem_ver"] for v in versions.values()}:
             raise RuntimeError(f"Trying to publish {sem_ver} again!")
 
diff --git a/backoffice/utils/s3_structure.py b/backoffice/utils/s3_structure.py
index 0d33672a..358c22fd 100644
--- a/backoffice/utils/s3_structure.py
+++ b/backoffice/utils/s3_structure.py
@@ -12,7 +12,10 @@ class VersionDetails(TypedDict):
     sem_ver: Optional[str]
 
 
-Versions = dict[int, VersionDetails]
+VersionNr = int
+"""the n-th published version"""
+
+Versions = dict[VersionNr, VersionDetails]
 """info about published resource versions at `<id>/versions.json`"""
 
 LogCategory = Literal[
diff --git a/backoffice/validate_format.py b/backoffice/validate_format.py
index a3e686ee..92758497 100644
--- a/backoffice/validate_format.py
+++ b/backoffice/validate_format.py
@@ -233,12 +233,12 @@ def validate_format(staged: StagedVersion):
 
         rd = rd_latest
         rd.validation_summary.status = "passed"  # passed in 'discover' mode
-        if not isinstance(rd, InvalidDescr) and rd.sem_ver is not None:
+        if not isinstance(rd, InvalidDescr) and rd.version is not None:
             published = staged.get_published_versions()
-            if str(rd.sem_ver) in {v["sem_ver"] for v in published.values()}:
+            if str(rd.version) in {v["sem_ver"] for v in published.values()}:
                 error = ErrorEntry(
-                    loc=("sem_ver",),
-                    msg=f"Trying to publish semantic version {rd.sem_ver} again!",
+                    loc=("version",),
+                    msg=f"Trying to publish version {rd.version} again!",
                     type="error",
                 )
             else:
@@ -246,7 +246,7 @@ def validate_format(staged: StagedVersion):
 
             rd.validation_summary.add_detail(
                 ValidationDetail(
-                    name="Enforce that RDF has unpublished semantic version (field `sem_ver`)",
+                    name="Enforce that RDF has unpublished semantic `version`",
                     status="passed" if error is None else "failed",
                     errors=[] if error is None else [error],
                 )
diff --git a/setup.py b/setup.py
index c6cb11e3..9355b89a 100644
--- a/setup.py
+++ b/setup.py
@@ -31,8 +31,8 @@
     ],
     packages=find_packages(exclude=["tests"]),
     install_requires=[
-        "bioimageio.core @ git+https://github.com/bioimage-io/core-bioimage-io-python@40aae1005e6caea4a3ad6104f54deba8582d0f87",  # TODO: change to released version
-        "bioimageio.spec @ git+https://github.com/bioimage-io/spec-bioimage-io@b9714ba8d8214c67e9377a8cd24f6ba65ed1b981",  # TODO: change to released version
+        "bioimageio.core @ git+https://github.com/bioimage-io/core-bioimage-io-python@569666b426cb089503f2ee3bb5651e124d8740e8",  # TODO: change to released version
+        "bioimageio.spec @ git+https://github.com/bioimage-io/spec-bioimage-io@06e6b0f77c696e7c5192fa1340482f97b2df98fc",  # TODO: change to released version
         "fire",
         "loguru",
         "minio==7.2.4",