diff --git a/rattail_harvest/importing/versions.py b/rattail_harvest/importing/versions.py
new file mode 100644
index 0000000..3dd5571
--- /dev/null
+++ b/rattail_harvest/importing/versions.py
@@ -0,0 +1,73 @@
+# -*- coding: utf-8; -*-
+################################################################################
+#
+#  Rattail -- Retail Software Framework
+#  Copyright © 2010-2022 Lance Edgar
+#
+#  This file is part of Rattail.
+#
+#  Rattail is free software: you can redistribute it and/or modify it under the
+#  terms of the GNU General Public License as published by the Free Software
+#  Foundation, either version 3 of the License, or (at your option) any later
+#  version.
+#
+#  Rattail is distributed in the hope that it will be useful, but WITHOUT ANY
+#  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+#  FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+#  details.
+#
+#  You should have received a copy of the GNU General Public License along with
+#  Rattail.  If not, see <http://www.gnu.org/licenses/>.
+#
+################################################################################
+"""
+Rattail -> Rattail "versions" data import
+"""
+
+from rattail.importing import versions as base
+
+
+class HarvestVersionMixin(object):
+
+    def add_harvest_importers(self, importers):
+        importers['HarvestUser'] = HarvestUserImporter
+        importers['HarvestClient'] = HarvestClientImporter
+        importers['HarvestProject'] = HarvestProjectImporter
+        importers['HarvestTask'] = HarvestTaskImporter
+        importers['HarvestTimeEntry'] = HarvestTimeEntryImporter
+        return importers
+
+
+class HarvestUserImporter(base.VersionImporter):
+
+    @property
+    def host_model_class(self):
+        return self.model.HarvestUser
+
+
+class HarvestClientImporter(base.VersionImporter):
+
+    @property
+    def host_model_class(self):
+        return self.model.HarvestClient
+
+
+class HarvestProjectImporter(base.VersionImporter):
+
+    @property
+    def host_model_class(self):
+        return self.model.HarvestProject
+
+
+class HarvestTaskImporter(base.VersionImporter):
+
+    @property
+    def host_model_class(self):
+        return self.model.HarvestTask
+
+
+class HarvestTimeEntryImporter(base.VersionImporter):
+
+    @property
+    def host_model_class(self):
+        return self.model.HarvestTimeEntry