diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2c54745b47..d3935bc970 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,10 @@ Changes are grouped as follows
 - `Fixed` for any bug fixes.
 - `Security` in case of vulnerabilities.
 
+## [7.5.2] - 2023-12-05
+### Fixed
+- The built-in `hash` function was mistakenly stored on `WorkflowDefinitionUpsert` instances after `__init__` and has been removed.
+
 ## [7.5.1] - 2023-12-01
 ### Changed
 - Raise an exception if `ClientConfig:base_url` is set to `None` or an empty string
@@ -32,8 +36,7 @@ Changes are grouped as follows
 
 ## [7.4.1] - 2023-11-28
 ### Fixed
-- Error in logic when creating a `Transformation`. This is causing when calling `client.transformations.update`. 
-  This is now fixed. 
+- Error in validation logic when creating a `Transformation` caused many calls to `client.transformations.update` to fail.
 
 ## [7.4.0] - 2023-11-27
 ### Changed
diff --git a/cognite/client/_version.py b/cognite/client/_version.py
index 91746e1307..1787025460 100644
--- a/cognite/client/_version.py
+++ b/cognite/client/_version.py
@@ -1,4 +1,4 @@
 from __future__ import annotations
 
-__version__ = "7.5.1"
+__version__ = "7.5.2"
 __api_subversion__ = "V20220125"
diff --git a/cognite/client/data_classes/workflows.py b/cognite/client/data_classes/workflows.py
index d44ee69e74..f4332e0b9c 100644
--- a/cognite/client/data_classes/workflows.py
+++ b/cognite/client/data_classes/workflows.py
@@ -466,8 +466,8 @@ def load(cls, data: dict[str, Any]) -> FunctionTaskOutput:
 
     def dump(self, camel_case: bool = True) -> dict[str, Any]:
         return {
-            ("callId" if camel_case else "call_id"): self.call_id,
-            ("functionId" if camel_case else "function_id"): self.function_id,
+            "callId" if camel_case else "call_id": self.call_id,
+            "functionId" if camel_case else "function_id": self.function_id,
             "response": self.response,
         }
 
@@ -629,7 +629,6 @@ def __init__(
         tasks: list[WorkflowTask],
         description: str | None,
     ) -> None:
-        self.hash = hash
         self.tasks = tasks
         self.description = description
 
diff --git a/pyproject.toml b/pyproject.toml
index 4bfa5e4182..249781f1c7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [tool.poetry]
 name = "cognite-sdk"
 
-version = "7.5.1"
+version = "7.5.2"
 description = "Cognite Python SDK"
 readme = "README.md"
 documentation = "https://cognite-sdk-python.readthedocs-hosted.com"
diff --git a/tests/tests_integration/test_api/test_workflows.py b/tests/tests_integration/test_api/test_workflows.py
index a922d64fe7..0f1993e9fd 100644
--- a/tests/tests_integration/test_api/test_workflows.py
+++ b/tests/tests_integration/test_api/test_workflows.py
@@ -248,7 +248,7 @@ def test_upsert_delete(self, cognite_client: CogniteClient) -> None:
 
             assert created_version.workflow_external_id == version.workflow_external_id
             assert created_version.workflow_definition.description == version.workflow_definition.description
-            assert created_version.workflow_definition.hash is not None
+            assert isinstance(created_version.workflow_definition.hash_, str)
         finally:
             if created_version is not None:
                 cognite_client.workflows.versions.delete(
diff --git a/tests/tests_unit/test_data_classes/test_workflows.py b/tests/tests_unit/test_data_classes/test_workflows.py
index 76223e8609..c3c976cd39 100644
--- a/tests/tests_unit/test_data_classes/test_workflows.py
+++ b/tests/tests_unit/test_data_classes/test_workflows.py
@@ -11,6 +11,9 @@
     FunctionTaskOutput,
     FunctionTaskParameters,
     TransformationTaskOutput,
+    TransformationTaskParameters,
+    WorkflowDefinition,
+    WorkflowDefinitionUpsert,
     WorkflowExecutionDetailed,
     WorkflowIds,
     WorkflowTask,
@@ -19,6 +22,15 @@
 )
 
 
+class TestWorkFlowDefinitions:
+    def test_upsert_variant_doesnt_accept_hash(self):
+        task = WorkflowTask(external_id="foo", parameters=TransformationTaskParameters(external_id="something"))
+        WorkflowDefinition(tasks=[task], description="desc", hash_="very-random")
+
+        with pytest.raises(TypeError, match="unexpected keyword argument 'hash_'$"):
+            WorkflowDefinitionUpsert(tasks=[task], description="desc", hash_="very-random")
+
+
 class TestWorkflowTaskOutput:
     @pytest.mark.parametrize(
         ["output", "expected"],