diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 21774e6507..98512b60eb 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -48,7 +48,7 @@ jobs:
           go-version-file: go.mod
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.12
+          python-version: 3.13
       - uses: hynek/setup-cached-uv@v2
       - name: Prepare tox
         run: uv pip install --system tox tox-uv
@@ -138,7 +138,7 @@ jobs:
           go-version-file: go.mod
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.12
+          python-version: 3.13
       - uses: hynek/setup-cached-uv@v2
       - name: Prepare tox
         run: uv pip install --system tox tox-uv
@@ -171,7 +171,7 @@ jobs:
           go-version-file: go.mod
       - uses: goreleaser/goreleaser-action@v6
         with:
-          version: '~> v2'
+          version: "~> v2"
           args: release --clean
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/docs/yaml.md b/docs/yaml.md
index 2b4e67e69b..1183cb9451 100644
--- a/docs/yaml.md
+++ b/docs/yaml.md
@@ -100,7 +100,7 @@ build:
   python_version: "3.11.1"
 ```
 
-Cog supports all active branches of Python: 3.8, 3.9, 3.10, 3.11, 3.12, 3.13. If you don't define a version, Cog will use the latest version of Python 3.12 or a version of Python that is compatible with the versions of PyTorch or TensorFlow you specify.
+Cog supports all active branches of Python: 3.8, 3.9, 3.10, 3.11, 3.12, 3.13. If you don't define a version, Cog will use the latest version of Python 3.13 or a version of Python that is compatible with the versions of PyTorch or TensorFlow you specify.
 
 Note that these are the versions supported **in the Docker container**, not your host machine. You can run any version(s) of Python you wish on your host machine.
 
@@ -158,7 +158,7 @@ r8.im is Replicate's registry, but this can be any Docker registry.
 
 If you don't set this, then a name will be generated from the directory name.
 
-If you set this, then you can run `cog push` without specifying the model name. 
+If you set this, then you can run `cog push` without specifying the model name.
 
 If you specify an image name argument when pushing (like `cog push your-username/custom-model-name`), the argument will be used and the value of `image` in cog.yaml will be ignored.
 
diff --git a/pkg/config/config.go b/pkg/config/config.go
index f3e28eb7f6..7cc726c783 100644
--- a/pkg/config/config.go
+++ b/pkg/config/config.go
@@ -80,7 +80,7 @@ func DefaultConfig() *Config {
 	return &Config{
 		Build: &Build{
 			GPU:           false,
-			PythonVersion: "3.12",
+			PythonVersion: "3.13",
 		},
 	}
 }
diff --git a/pkg/config/config_test.go b/pkg/config/config_test.go
index 934fba5a70..9686cf78b8 100644
--- a/pkg/config/config_test.go
+++ b/pkg/config/config_test.go
@@ -20,7 +20,7 @@ func TestValidateModelPythonVersion(t *testing.T) {
 	}{
 		{
 			name:          "ValidVersion",
-			pythonVersion: "3.12",
+			pythonVersion: "3.13",
 		},
 		{
 			name:          "MinimumVersion",
@@ -39,7 +39,7 @@ func TestValidateModelPythonVersion(t *testing.T) {
 		},
 		{
 			name:          "FullyQualifiedVersion",
-			pythonVersion: "3.12.1",
+			pythonVersion: "3.13.1",
 		},
 		{
 			name:          "InvalidFormat",
diff --git a/pkg/dockerfile/base_test.go b/pkg/dockerfile/base_test.go
index ea7f4faae1..13fc01e727 100644
--- a/pkg/dockerfile/base_test.go
+++ b/pkg/dockerfile/base_test.go
@@ -55,7 +55,7 @@ func TestBaseImageConfigurationExists(t *testing.T) {
 }
 
 func TestBaseImageConfigurationExistsNoTorch(t *testing.T) {
-	exists, _, _, _ := BaseImageConfigurationExists("", "3.12", "")
+	exists, _, _, _ := BaseImageConfigurationExists("", "3.13", "")
 	require.True(t, exists)
 }
 
diff --git a/tox.ini b/tox.ini
index 450462c728..6f9ed9ed34 100644
--- a/tox.ini
+++ b/tox.ini
@@ -32,7 +32,7 @@ commands =
   tests: pytest python/tests --cov={env_site_packages_dir}/cog --cov-report term-missing:skip-covered {posargs:-n auto -vv}
 
 [testenv:lint]
-base_python = python3.12
+base_python = python3.13
 skip_install = true
 deps = ruff
 commands =
@@ -40,7 +40,7 @@ commands =
   ruff format --check python
 
 [testenv:typecheck-pydantic1]
-base_python = python3.12
+base_python = python3.13
 deps =
     pyright==1.1.375
     pydantic>=1,<2
@@ -54,14 +54,14 @@ allowlist_externals =
     sed
 
 [testenv:typecheck-pydantic2]
-base_python = python3.12
+base_python = python3.13
 deps =
     pyright==1.1.375
     pydantic>=2,<3
 commands = pyright {posargs}
 
 [testenv:integration]
-base_python = python3.12
+base_python = python3.13
 changedir = test-integration
 skip_install = true
 deps =