diff --git a/poetry.lock b/poetry.lock
index 8b1e9cb7..8c918630 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1865,9 +1865,7 @@ develop = false
 [package.dependencies]
 celery = "*"
 configparser = "*"
-dateparser = "*"
 lxml = "*"
-pytz = "*"
 
 [package.source]
 type = "git"
@@ -2621,7 +2619,6 @@ greenlet = [
     {file = "greenlet-1.1.3.post0-cp39-cp39-musllinux_1_1_x86_64.whl", hash = "sha256:0a954002064ee919b444b19c1185e8cce307a1f20600f47d6f4b6d336972c809"},
     {file = "greenlet-1.1.3.post0-cp39-cp39-win32.whl", hash = "sha256:2ccdc818cc106cc238ff7eba0d71b9c77be868fdca31d6c3b1347a54c9b187b2"},
     {file = "greenlet-1.1.3.post0-cp39-cp39-win_amd64.whl", hash = "sha256:91a84faf718e6f8b888ca63d0b2d6d185c8e2a198d2a7322d75c303e7097c8b7"},
-    {file = "greenlet-1.1.3.post0.tar.gz", hash = "sha256:f5e09dc5c6e1796969fd4b775ea1417d70e49a5df29aaa8e5d10675d9e11872c"},
 ]
 gunicorn = [
     {file = "gunicorn-20.1.0-py3-none-any.whl", hash = "sha256:9dcc4547dbb1cb284accfb15ab5667a0e5d1881cc443e0677b4882a4067a807e"},
diff --git a/src/spiffworkflow_backend/api.yml b/src/spiffworkflow_backend/api.yml
index 0f0a49c2..1ef9cf67 100755
--- a/src/spiffworkflow_backend/api.yml
+++ b/src/spiffworkflow_backend/api.yml
@@ -153,7 +153,6 @@ paths:
         description: The number of groups to show per page. Defaults to page 10.
         schema:
           type: integer
-    # process_groups_list
     get:
       operationId: spiffworkflow_backend.routes.process_api_blueprint.process_groups_list
       summary: get list
@@ -168,7 +167,6 @@ paths:
                 type: array
                 items:
                   $ref: "#/components/schemas/ProcessModelCategory"
-    # process_group_add
     post:
       operationId: spiffworkflow_backend.routes.process_api_blueprint.process_group_add
       summary: Add process group
@@ -429,7 +427,7 @@ paths:
         description: For filtering - beginning of start window - in seconds since epoch
         schema:
           type: integer
-      - name: start_till
+      - name: start_to
         in: query
         required: false
         description: For filtering - end of start window - in seconds since epoch
@@ -441,7 +439,7 @@ paths:
         description: For filtering - beginning of end window - in seconds since epoch
         schema:
           type: integer
-      - name: end_till
+      - name: end_to
         in: query
         required: false
         description: For filtering - end of end window - in seconds since epoch
diff --git a/src/spiffworkflow_backend/models/process_group.py b/src/spiffworkflow_backend/models/process_group.py
index 0b100ed4..381f8f63 100644
--- a/src/spiffworkflow_backend/models/process_group.py
+++ b/src/spiffworkflow_backend/models/process_group.py
@@ -1,6 +1,7 @@
 """Process_group."""
 from __future__ import annotations
 
+import dataclasses
 from dataclasses import dataclass
 from dataclasses import field
 from typing import Any
@@ -20,6 +21,7 @@ class ProcessGroup:
 
     id: str  # A unique string name, lower case, under scores (ie, 'my_group')
     display_name: str
+    description: str | None = None
     display_order: int | None = 0
     admin: bool | None = False
     process_models: list[ProcessModelInfo] = field(
@@ -38,6 +40,12 @@ class ProcessGroup:
             return True
         return False
 
+    @property
+    def serialized(self) -> dict:
+        """Serialized."""
+        original_dict = dataclasses.asdict(self)
+        return {x: original_dict[x] for x in original_dict if x not in ["sort_index"]}
+
 
 class ProcessGroupSchema(Schema):
     """ProcessGroupSchema."""
diff --git a/src/spiffworkflow_backend/models/process_model.py b/src/spiffworkflow_backend/models/process_model.py
index 9558a79b..1928f312 100644
--- a/src/spiffworkflow_backend/models/process_model.py
+++ b/src/spiffworkflow_backend/models/process_model.py
@@ -30,7 +30,6 @@ class ProcessModelInfo:
     display_name: str
     description: str
     process_group_id: str = ""
-    process_group: Any | None = None
     primary_file_name: str | None = None
     primary_process_id: str | None = None
     display_order: int | None = 0
diff --git a/src/spiffworkflow_backend/routes/process_api_blueprint.py b/src/spiffworkflow_backend/routes/process_api_blueprint.py
index 25c033c2..f0b9065c 100644
--- a/src/spiffworkflow_backend/routes/process_api_blueprint.py
+++ b/src/spiffworkflow_backend/routes/process_api_blueprint.py
@@ -43,6 +43,7 @@ from spiffworkflow_backend.models.message_triggerable_process_model import (
     MessageTriggerableProcessModel,
 )
 from spiffworkflow_backend.models.principal import PrincipalModel
+from spiffworkflow_backend.models.process_group import ProcessGroup
 from spiffworkflow_backend.models.process_group import ProcessGroupSchema
 from spiffworkflow_backend.models.process_instance import ProcessInstanceApiSchema
 from spiffworkflow_backend.models.process_instance import ProcessInstanceModel
@@ -136,18 +137,12 @@ def permissions_check(body: Dict[str, Dict[str, list[str]]]) -> flask.wrappers.R
     return make_response(jsonify({"results": response_dict}), 200)
 
 
-def process_group_add(
-    body: Dict[str, Union[str, bool, int]]
-) -> flask.wrappers.Response:
+def process_group_add(body: dict) -> flask.wrappers.Response:
     """Add_process_group."""
     process_model_service = ProcessModelService()
-    process_group = ProcessGroupSchema().load(body)
+    process_group = ProcessGroup(**body)
     process_model_service.add_process_group(process_group)
-    return Response(
-        json.dumps(ProcessGroupSchema().dump(process_group)),
-        status=201,
-        mimetype="application/json",
-    )
+    return make_response(jsonify(process_group), 201)
 
 
 def process_group_delete(process_group_id: str) -> flask.wrappers.Response:
@@ -156,13 +151,18 @@ def process_group_delete(process_group_id: str) -> flask.wrappers.Response:
     return Response(json.dumps({"ok": True}), status=200, mimetype="application/json")
 
 
-def process_group_update(
-    process_group_id: str, body: Dict[str, Union[str, bool, int]]
-) -> Dict[str, Union[str, bool, int]]:
+def process_group_update(process_group_id: str, body: dict) -> flask.wrappers.Response:
     """Process Group Update."""
-    process_group = ProcessGroupSchema().load(body)
+    body_include_list = ["display_name", "description"]
+    body_filtered = {
+        include_item: body[include_item]
+        for include_item in body_include_list
+        if include_item in body
+    }
+
+    process_group = ProcessGroup(id=process_group_id, **body_filtered)
     ProcessModelService().update_process_group(process_group)
-    return ProcessGroupSchema().dump(process_group)  # type: ignore
+    return make_response(jsonify(process_group), 200)
 
 
 def process_groups_list(page: int = 1, per_page: int = 100) -> flask.wrappers.Response:
@@ -175,6 +175,7 @@ def process_groups_list(page: int = 1, per_page: int = 100) -> flask.wrappers.Re
     remainder = len(process_groups) % per_page
     if remainder > 0:
         pages += 1
+
     response_json = {
         "results": ProcessGroupSchema(many=True).dump(batch),
         "pagination": {
@@ -200,7 +201,7 @@ def process_group_show(
                 status_code=400,
             )
         ) from exception
-    return ProcessGroupSchema().dump(process_group)
+    return make_response(jsonify(process_group), 200)
 
 
 def process_model_add(
@@ -226,7 +227,6 @@ def process_model_add(
             status_code=400,
         )
 
-    process_model_info.process_group = process_group
     process_model_service.add_spec(process_model_info)
     return Response(
         json.dumps(ProcessModelInfoSchema().dump(process_model_info)),
@@ -656,9 +656,9 @@ def process_instance_list(
     page: int = 1,
     per_page: int = 100,
     start_from: Optional[int] = None,
-    start_till: Optional[int] = None,
+    start_to: Optional[int] = None,
     end_from: Optional[int] = None,
-    end_till: Optional[int] = None,
+    end_to: Optional[int] = None,
     process_status: Optional[str] = None,
 ) -> flask.wrappers.Response:
     """Process_instance_list."""
@@ -689,17 +689,17 @@ def process_instance_list(
         process_instance_query = process_instance_query.filter(
             ProcessInstanceModel.start_in_seconds >= start_from
         )
-    if start_till is not None:
+    if start_to is not None:
         process_instance_query = process_instance_query.filter(
-            ProcessInstanceModel.start_in_seconds <= start_till
+            ProcessInstanceModel.start_in_seconds <= start_to
         )
     if end_from is not None:
         process_instance_query = process_instance_query.filter(
             ProcessInstanceModel.end_in_seconds >= end_from
         )
-    if end_till is not None:
+    if end_to is not None:
         process_instance_query = process_instance_query.filter(
-            ProcessInstanceModel.end_in_seconds <= end_till
+            ProcessInstanceModel.end_in_seconds <= end_to
         )
     if process_status is not None:
         process_status_array = process_status.split(",")
diff --git a/src/spiffworkflow_backend/services/process_model_service.py b/src/spiffworkflow_backend/services/process_model_service.py
index 57d84229..e10092d5 100644
--- a/src/spiffworkflow_backend/services/process_model_service.py
+++ b/src/spiffworkflow_backend/services/process_model_service.py
@@ -170,7 +170,7 @@ class ProcessModelService(FileSystemService):
         json_path = os.path.join(cat_path, self.CAT_JSON_FILE)
         with open(json_path, "w") as cat_json:
             json.dump(
-                self.GROUP_SCHEMA.dump(process_group),
+                process_group.serialized,
                 cat_json,
                 indent=4,
                 sort_keys=True,
@@ -274,6 +274,5 @@ class ProcessModelService(FileSystemService):
             with open(spec_path, "w") as wf_json:
                 json.dump(self.WF_SCHEMA.dump(spec), wf_json, indent=4)
         if process_group:
-            spec.process_group = process_group
             spec.process_group_id = process_group.id
         return spec
diff --git a/tests/spiffworkflow_backend/integration/test_process_api.py b/tests/spiffworkflow_backend/integration/test_process_api.py
index 7ac6b923..bad47ce9 100644
--- a/tests/spiffworkflow_backend/integration/test_process_api.py
+++ b/tests/spiffworkflow_backend/integration/test_process_api.py
@@ -17,7 +17,6 @@ from spiffworkflow_backend.exceptions.process_entity_not_found_error import (
 from spiffworkflow_backend.models.active_task import ActiveTaskModel
 from spiffworkflow_backend.models.group import GroupModel
 from spiffworkflow_backend.models.process_group import ProcessGroup
-from spiffworkflow_backend.models.process_group import ProcessGroupSchema
 from spiffworkflow_backend.models.process_instance import ProcessInstanceModel
 from spiffworkflow_backend.models.process_instance import ProcessInstanceStatus
 from spiffworkflow_backend.models.process_instance_report import (
@@ -388,25 +387,29 @@ class TestProcessApi(BaseTest):
             display_name="Another Test Category",
             display_order=0,
             admin=False,
+            description="Test Description",
         )
         response = client.post(
             "/v1.0/process-groups",
             headers=self.logged_in_headers(with_super_admin_user),
             content_type="application/json",
-            data=json.dumps(ProcessGroupSchema().dump(process_group)),
+            data=json.dumps(process_group.serialized),
         )
         assert response.status_code == 201
+        assert response.json
 
         # Check what is returned
-        result = ProcessGroupSchema().loads(response.get_data(as_text=True))
+        result = ProcessGroup(**response.json)
         assert result is not None
         assert result.display_name == "Another Test Category"
         assert result.id == "test"
+        assert result.description == "Test Description"
 
         # Check what is persisted
         persisted = ProcessModelService().get_process_group("test")
         assert persisted.display_name == "Another Test Category"
         assert persisted.id == "test"
+        assert persisted.description == "Test Description"
 
     def test_process_group_delete(
         self,
@@ -461,7 +464,7 @@ class TestProcessApi(BaseTest):
             f"/v1.0/process-groups/{group_id}",
             headers=self.logged_in_headers(with_super_admin_user),
             content_type="application/json",
-            data=json.dumps(ProcessGroupSchema().dump(process_group)),
+            data=json.dumps(process_group.serialized),
         )
         assert response.status_code == 200
 
@@ -788,6 +791,7 @@ class TestProcessApi(BaseTest):
             f"/v1.0/process-groups/{test_process_group_id}",
             headers=self.logged_in_headers(with_super_admin_user),
         )
+
         assert response.status_code == 200
         assert response.json is not None
         assert response.json["id"] == test_process_group_id
@@ -1299,7 +1303,7 @@ class TestProcessApi(BaseTest):
 
         # start > 2000, end < 5000 - this should eliminate the first 2 and the last
         response = client.get(
-            "/v1.0/process-instances?start_from=2001&end_till=5999",
+            "/v1.0/process-instances?start_from=2001&end_to=5999",
             headers=self.logged_in_headers(with_super_admin_user),
         )
         assert response.json is not None
@@ -1310,7 +1314,7 @@ class TestProcessApi(BaseTest):
 
         # start > 1000, start < 4000 - this should eliminate the first and the last 2
         response = client.get(
-            "/v1.0/process-instances?start_from=1001&start_till=3999",
+            "/v1.0/process-instances?start_from=1001&start_to=3999",
             headers=self.logged_in_headers(with_super_admin_user),
         )
         assert response.json is not None
@@ -1321,7 +1325,7 @@ class TestProcessApi(BaseTest):
 
         # end > 2000, end < 6000 - this should eliminate the first and the last
         response = client.get(
-            "/v1.0/process-instances?end_from=2001&end_till=5999",
+            "/v1.0/process-instances?end_from=2001&end_to=5999",
             headers=self.logged_in_headers(with_super_admin_user),
         )
         assert response.json is not None