diff --git a/.github/workflows/python-ci.yml b/.github/workflows/python-ci.yml
index f2b47ddd9..081748384 100644
--- a/.github/workflows/python-ci.yml
+++ b/.github/workflows/python-ci.yml
@@ -35,7 +35,7 @@ jobs:
 
       - uses: actions/setup-python@v2
         with:
-          python-version: 3.9
+          python-version: 3.9.9
       - run: pip install -e .
       - run: pip install mypy types-requests
       - run: mypy looker_sdk/
@@ -57,7 +57,7 @@ jobs:
           - macos
           - windows
         python-version:
-          - '3.9'
+          - '3.9.9'
         include:
           - python-version: '3.6'
             os: ubuntu
@@ -179,7 +179,7 @@ jobs:
           pip install tox
 
       - name: Determine credentials version
-        # Prior to 21_18, each version had different credentials and a 
+        # Prior to 21_18, each version had different credentials and a
         # different secret. 21_20 and later all use the same credentials
         # as 21_18. The parse_version.sh script parses the version and
         # yields 21_12, 21_14, 21_16 etc for those versions but 21_18 for
@@ -220,7 +220,7 @@ jobs:
 
       - uses: actions/setup-python@v2
         with:
-          python-version: 3.9
+          python-version: 3.9.9
       - name: Twine upload check
         run: |
           pip install wheel twine
diff --git a/python/.python-version b/python/.python-version
index a43eb03b9..4e8cb5855 100644
--- a/python/.python-version
+++ b/python/.python-version
@@ -1,3 +1,4 @@
+3.9.9
 3.9.0
 3.8.2
 3.7.6
diff --git a/python/Pipfile b/python/Pipfile
index 87ba09a41..1319d5000 100644
--- a/python/Pipfile
+++ b/python/Pipfile
@@ -8,6 +8,7 @@ pytest = "*"
 ptpython = "*"
 ipython = "*"
 mypy = "*"
+types-requests = "*"
 pytest-cov = "*"
 black = "*"
 flake8 = "*"
@@ -26,11 +27,12 @@ tox-pyenv = "*"
 [packages]
 requests = "*"
 attrs = "*"
-cattrs = "==1.1.2"
+cattrs = ">=1.3"
 python-dateutil = "*"
 
 [requires]
-python_full_version = "3.8.2"
+# pin python at 3.9.9 due to https://github.com/looker-open-source/sdk-codegen/issues/944
+python_full_version = "3.9.9"
 
 [pipenv]
 # for `black`
diff --git a/python/looker_sdk/rtl/serialize.py b/python/looker_sdk/rtl/serialize.py
index ff6b7505e..36e30e723 100644
--- a/python/looker_sdk/rtl/serialize.py
+++ b/python/looker_sdk/rtl/serialize.py
@@ -138,6 +138,13 @@ def unstructure_hook(api_model):
             del data[key]
         elif value == model.EXPLICIT_NULL:
             data[key] = None
+        # bug here: in the unittests cattrs unstructures this correctly
+        # as an enum calling .value but in the integration tests we see
+        # it doesn't for WriteCreateQueryTask.result_format for some reason
+        # Haven't been able to debug it fully, so catching and processing
+        # it here.
+        elif isinstance(value, enum.Enum):
+            data[key] = value.value
     for reserved in keyword.kwlist:
         if f"{reserved}_" in data:
             data[reserved] = data.pop(f"{reserved}_")
@@ -153,7 +160,6 @@ def datetime_structure_hook(
     ) -> datetime.datetime:
         return parser.isoparse(d)
 
-
 else:
 
     def datetime_structure_hook(
@@ -165,4 +171,4 @@ def datetime_structure_hook(
 converter31.register_structure_hook(datetime.datetime, datetime_structure_hook)
 converter40.register_structure_hook(datetime.datetime, datetime_structure_hook)
 cattr.register_unstructure_hook(model.Model, unstructure_hook)  # type: ignore
-cattr.register_unstructure_hook(datetime.datetime, lambda dt: dt.strftime(DATETIME_FMT))
+cattr.register_unstructure_hook(datetime.datetime, lambda dt: dt.strftime(DATETIME_FMT))  # type: ignore
diff --git a/python/setup.py b/python/setup.py
index 4ca746fbc..455920ddd 100644
--- a/python/setup.py
+++ b/python/setup.py
@@ -38,7 +38,7 @@
     "python-dateutil;python_version<'3.7'",
     # Python 3.7+
     "attrs >= 20.1.0;python_version>='3.7'",
-    "cattrs == 1.1.2;python_version>='3.7'",
+    "cattrs >= 1.3;python_version>='3.7'",
     "typing-extensions;python_version<'3.8'",
 ]
 
@@ -54,7 +54,8 @@
     name=NAME,
     package_data={"looker_sdk": ["py.typed", "looker_sdk/looker-sample.ini"]},
     packages=find_packages(),
-    python_requires="~=3.6",
+    # restrict python to <=3.9.9 due to https://github.com/looker-open-source/sdk-codegen/issues/944
+    python_requires=">=3.6, <=3.9.9",
     url="https://pypi.python.org/pypi/looker_sdk",
     version=VERSION,
 )