diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index eee977d..b0af12f 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -20,9 +20,9 @@ jobs:
     runs-on: ${{ matrix.platform }}
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v3
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
diff --git a/.github/workflows/python-publish.yml b/.github/workflows/python-publish.yml
index 1a03a7b..4089a31 100644
--- a/.github/workflows/python-publish.yml
+++ b/.github/workflows/python-publish.yml
@@ -13,9 +13,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Set up Python
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v3
       with:
         python-version: '3.x'
     - name: Install dependencies
diff --git a/requirements.txt b/requirements.txt
index 047ed43..3e46cba 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-hsmodels == 0.5.4
+hsmodels >= 0.5.5
 pytest == 6.0.2
 requests == 2.24.0
 email-validator
diff --git a/setup.py b/setup.py
index cf93f07..f2a2bf2 100644
--- a/setup.py
+++ b/setup.py
@@ -5,11 +5,11 @@
 
 setup(
     name='hsclient',
-    version='0.3.2',
+    version='0.3.3',
     packages=find_packages(include=['hsclient', 'hsclient.*'],
                            exclude=("tests",)),
     install_requires=[
-        'hsmodels==0.5.4',
+        'hsmodels>=0.5.5',
         'requests',
         'requests_oauthlib',
         'pandas'
diff --git a/tests/test_functional.py b/tests/test_functional.py
index 69ba820..3eda315 100644
--- a/tests/test_functional.py
+++ b/tests/test_functional.py
@@ -185,7 +185,7 @@ def test_resource_metadata_updating(new_resource):
     new_resource.metadata.title = "resource test"
     new_resource.metadata.additional_metadata = {"key1": "value1", "key2": "value2", "key3": "value3"}
     new_resource.metadata.abstract = "world’s"
-    new_resource.metadata.relations = [Relation(type=RelationType.isCopiedFrom, value="is hosted by value")]
+    new_resource.metadata.relations = [Relation(type=RelationType.isVersionOf, value="is version of")]
 
     new_resource.save()
 
@@ -198,7 +198,7 @@ def test_resource_metadata_updating(new_resource):
     assert new_resource.metadata.additional_metadata["key3"] == "value3"
     assert new_resource.metadata.abstract == "world’s"
 
-    assert new_resource.metadata.relations == [Relation(type=RelationType.isCopiedFrom, value="is hosted by value")]
+    assert new_resource.metadata.relations == [Relation(type=RelationType.isVersionOf, value="is version of")]
 
 
 def test_system_metadata(new_resource):
@@ -218,7 +218,7 @@ def test_resource_delete(hydroshare, new_resource):
 
 
 def test_resource_cached_by_HydroShare_instance_slow(hydroshare, new_resource):
-    """ Verify resource object is present in resource object cache. """
+    """Verify resource object is present in resource object cache."""
     res_id = new_resource.resource_id
     res = hydroshare.resource(res_id)
 
@@ -416,21 +416,25 @@ def test_empty_creator(new_resource):
 def test_aggregations(new_resource, files):
     root_path = "data/test_resource_metadata_files/"
     file_count = len(files) - 2  # exclude rdf/xml file
+    aggr_file_count = file_count
     new_resource.file_upload(*[os.path.join(root_path, file) for file in files])
     assert len(new_resource.aggregations()) == 1
     assert len(new_resource.files()) == 0
     agg = new_resource.aggregations()[0]
     agg_type = agg.metadata.type
-    assert len(agg.files()) == file_count
+    assert len(agg.files()) == aggr_file_count
     new_resource.aggregation_remove(agg)
     assert len(new_resource.aggregations()) == 0
+    if agg_type == "NetCDF":
+        # the txt file of the aggregation gets deleted when the netcdf aggregation is removed.
+        file_count = file_count - 1
     assert len(new_resource.files()) == file_count
     main_file = next(f for f in new_resource.files() if f.path.endswith(files[0]))
     assert main_file
     agg = new_resource.file_aggregate(main_file, agg_type)
     assert len(new_resource.aggregations()) == 1
     assert len(new_resource.files()) == 0
-    assert len(agg.files()) == file_count
+    assert len(agg.files()) == aggr_file_count
     with tempfile.TemporaryDirectory() as tmp:
         new_resource.aggregation_download(agg, tmp)
         files = os.listdir(tmp)
@@ -587,5 +591,6 @@ def test_resource_public(resource):
     resource.set_sharing_status(public=False)
     assert resource.system_metadata()['public'] is False
 
+
 def test_instantiate_hydroshare_object_without_args():
     HydroShare()