diff --git a/.github/workflows/test-pytest.yml b/.github/workflows/test-pytest.yml
index 6b81523..42f6b68 100644
--- a/.github/workflows/test-pytest.yml
+++ b/.github/workflows/test-pytest.yml
@@ -14,10 +14,10 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        python-version: [3.7, 3.8, 3.9, "3.10", "3.11", "3.12"]
+        python-version: [3.7, 3.8, 3.9, "3.10", "3.11"]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v2
       with:
diff --git a/README.md b/README.md
index a418466..81f4da2 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ Optionally, to allow `pygamma-agreement` to display visual representations of
 our API's objects in Jupyter Notebooks, [Matplotlib](https://matplotlib.org/>) 
 is needed.
 
-`pygamma-agreement` is a Python 3 package and is currently tested for Python 3.7 to  3.12. 
+`pygamma-agreement` is a Python 3 package and is currently tested for Python 3.7 to  3.11. 
 `pygamma-agreement` does not work with Python 2.7.