diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 6d3ebb4..a8630ef 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -15,14 +15,14 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11.0-beta.5"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
         os: [macOS-latest, ubuntu-latest, windows-latest]
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v1
+        uses: actions/checkout@v4
       - name: Set Up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install
diff --git a/bumpreqs/core.py b/bumpreqs/core.py
index 235df52..d48b5de 100644
--- a/bumpreqs/core.py
+++ b/bumpreqs/core.py
@@ -6,7 +6,7 @@
 
 from packaging.requirements import Requirement
 from packaging.specifiers import SpecifierSet
-from packaging.version import LegacyVersion, parse as parse_version, Version
+from packaging.version import parse as parse_version, Version
 
 from .marker_extract import extract_python
 
@@ -96,12 +96,12 @@ def fix(text: str, force: Optional[bool] = False) -> str:
 def _fetch_versions(
     project_name: str,
     only_for_python: Optional[VersionIntervals] = None,
-) -> List[Union[LegacyVersion, Version]]:
+) -> List[Version]:
     resp = requests.get(f"https://pypi.org/pypi/{project_name}/json")
     resp.raise_for_status()
     obj = resp.json()
 
-    versions: List[Union[LegacyVersion, Version]] = []
+    versions: List[Version] = []
     for k, v in obj["releases"].items():
         # Skip older releases that have no archives
         if not v:
@@ -109,8 +109,10 @@ def _fetch_versions(
         requires_python = v[0].get("requires_python")
         if requires_python and only_for_python:
             if only_for_python.intersect(VersionIntervals.from_str(requires_python)):
+                # TODO try/except
                 versions.append(parse_version(k))
         else:
+            # TODO try/except
             versions.append(parse_version(k))
 
     return versions