diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index 8b732e95b..ab5d4d9bb 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python_version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python_version: ["3.8", "3.9", "3.10", "3.11"]
 
     steps:
       - uses: actions/checkout@v3
diff --git a/pyproject.toml b/pyproject.toml
index f4b05be8e..f538e0b3c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,13 +12,12 @@ authors = [
 description = "Extend NeXus for materials science experiment and serve as a NOMAD parser implementation for NeXus."
 readme = "README.md"
 license = { file = "LICENSE" }
-requires-python = ">=3.8"
+requires-python = ">=3.8,!=3.12"
 classifiers = [
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
-    "Programming Language :: Python :: 3.12",
     "License :: OSI Approved :: Apache Software License",
     "Operating System :: OS Independent",
 ]