diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3070c08..9ad71f1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,9 +11,11 @@ jobs:
   msgcheck:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/setup-python@v3
-      - uses: actions/checkout@v3
-      - run: sudo apt install -y gettext aspell libenchant-dev
+      - uses: actions/setup-python@v4
+        with:
+          python-version: "3.10"
+      - uses: actions/checkout@v4
+      - run: sudo apt install -y gettext aspell libenchant-2-dev
       - uses: actions/cache@v3
         with:
           path: ~/.cache/pip
@@ -35,8 +37,10 @@ jobs:
           - "pydocstyle ."
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/setup-python@v3
-      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: "3.10"
+      - uses: actions/checkout@v4
       - uses: actions/cache@v3
         with:
           path: ~/.cache/pip
@@ -49,8 +53,10 @@ jobs:
   dist:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-python@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v4
+        with:
+          python-version: "3.10"
       - run: sudo apt install gettext -y
       - run: python -m pip install --upgrade pip build wheel twine readme-renderer
       - run: python -m build --sdist --wheel
@@ -78,11 +84,11 @@ jobs:
           - "test,progressbar"
     steps:
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - run: sudo apt install gettext -y
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - run: python -m pip install --upgrade pip codecov
     - run: python -m pip install -e .[${{ matrix.extra }}]
       if: ${{ matrix.extra }}
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 19f0b4e..a71d600 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -9,8 +9,10 @@ jobs:
   PyPi:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-python@v3
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v4
+      with:
+        python-version: "3.10"
     - run: sudo apt-get install gettext -y
     - run: python -m pip install --upgrade pip build wheel twine
     - run: python -m build --sdist --wheel
diff --git a/lint-requirements.txt b/lint-requirements.txt
index 7aae3f5..9279c0e 100644
--- a/lint-requirements.txt
+++ b/lint-requirements.txt
@@ -1,6 +1,6 @@
-bandit==1.7.4
-black==22.3.0
-flake8==4.0.1
-isort==5.10.1
+bandit==1.7.5
+black==23.10.0
+flake8==6.1.0
+isort==5.12.0
 msgcheck==4.0.0
-pydocstyle==6.1.1
+pydocstyle==6.3.0
diff --git a/stdimage/models.py b/stdimage/models.py
index 6e0083d..dd429d8 100644
--- a/stdimage/models.py
+++ b/stdimage/models.py
@@ -158,9 +158,9 @@ def __getstate__(self):
         state = super().__getstate__()
         state["variations"] = {}
         for variation_name in self.field.variations:
-            variation = getattr(self, variation_name)
-            variation_state = variation.__getstate__()
-            state["variations"][variation_name] = variation_state
+            if variation := getattr(self, variation_name, None):
+                variation_state = variation.__getstate__()
+                state["variations"][variation_name] = variation_state
         return state
 
     def __setstate__(self, state):
@@ -207,7 +207,7 @@ def __init__(
         render_variations=True,
         force_min_size=False,
         delete_orphans=False,
-        **kwargs
+        **kwargs,
     ):
         """
         Standardized ImageField for Django.
diff --git a/tests/test_models.py b/tests/test_models.py
index e8d47f2..e234521 100644
--- a/tests/test_models.py
+++ b/tests/test_models.py
@@ -174,6 +174,20 @@ def test_defer(self, db, django_assert_num_queries):
             deferred.image
         assert instance.image.thumbnail == deferred.image.thumbnail
 
+    @pytest.mark.django_db
+    def test_variations_deepcopy_unsaved(self):
+        instance_original = ResizeModel(image=self.fixtures["600x400.jpg"])
+        instance = deepcopy(instance_original)
+        assert isinstance(instance.image, StdImageFieldFile)
+        assert instance.image == instance_original.image
+
+    @pytest.mark.django_db
+    def test_variations_deepcopy_without_image(self):
+        instance_original = ThumbnailModel.objects.create(image=None)
+        instance = deepcopy(instance_original)
+        assert isinstance(instance.image, StdImageFieldFile)
+        assert instance.image == instance_original.image
+
     @pytest.mark.django_db
     def test_variations_deepcopy(self):
         """Tests test_variations() with a deep copied object"""