diff --git a/scripts/lib/changelog.py b/scripts/lib/changelog.py
index c3b12423..430009d8 100644
--- a/scripts/lib/changelog.py
+++ b/scripts/lib/changelog.py
@@ -2,7 +2,7 @@
 from .fs import file_read, file_write
 
 
-def changelog_prepare(dataset, updated_at, changelog_path):
+def changelog_prepare(dataset, tag, changelog_path):
   path = dict_get(dataset, ["path"])
   name = dict_get(dataset, ["attributes", "name"])
   release_notes = changelog_get_unreleased_section(changelog_path)
@@ -11,7 +11,7 @@ def changelog_prepare(dataset, updated_at, changelog_path):
       f"Cannot release dataset '{path}' without changelog. Please modify file '{changelog_path}': add '## Unreleased' section and briefly summarize the changes being released"
     )
 
-  full_changelog = file_read(changelog_path).replace(f"## Unreleased", f"## {updated_at}")
+  full_changelog = file_read(changelog_path).replace(f"## Unreleased", f"## {tag}")
   file_write(full_changelog, changelog_path)
 
   # attr_table = format_dataset_attributes_md_table(dict_get_required(dataset, ["attributes"]))
diff --git a/scripts/rebuild b/scripts/rebuild
index 3869ef02..3b047ffb 100755
--- a/scripts/rebuild
+++ b/scripts/rebuild
@@ -394,7 +394,7 @@ def prepare_dataset_release_infos(args, datasets, datasets_from_index_json, coll
     if args.release:
       _, last_version = dataset_get_versions(dataset_from_index)
       release_info = prepare_dataset_release_info(
-        dataset_dir, dataset_from_index, dict_get(last_version, ["tag"]), updated_at
+        dataset_dir, dataset_from_index, dict_get(last_version, ["tag"]), tag
       )
       if release_info is None:
         continue
@@ -450,7 +450,7 @@ def publish_to_github_releases(args, tag, commit_hash, release_notes):
   )
 
 
-def prepare_dataset_release_info(dataset_dir, dataset, last_version, updated_at):
+def prepare_dataset_release_info(dataset_dir, dataset, last_version, tag):
   # modified_files = list(git_get_modified_files(from_revision=last_version, dirs=dataset_dir))
   # modified_files = list(map(lambda f: realpath(f), modified_files))
 
@@ -468,7 +468,7 @@ def prepare_dataset_release_info(dataset_dir, dataset, last_version, updated_at)
   #     f"Unreleased' section and briefly summarize the changes being released"
   #   )
 
-  release_notes = changelog_prepare(dataset, updated_at, changelog_path)
+  release_notes = changelog_prepare(dataset, tag, changelog_path)
 
   return {"dataset": dataset, "release_notes": release_notes, "dataset_dir": dataset_dir}