diff --git a/.github/workflows/python-publish.yml b/.github/workflows/python-publish.yml
index 135ca7d..a96746a 100644
--- a/.github/workflows/python-publish.yml
+++ b/.github/workflows/python-publish.yml
@@ -27,7 +27,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v3
       with:
-        python-version: '3.10'
+        python-version: '3.12'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
diff --git a/.github/workflows/sphinx_render_docs.yml b/.github/workflows/sphinx_render_docs.yml
index 90ea83f..2c4fb1b 100644
--- a/.github/workflows/sphinx_render_docs.yml
+++ b/.github/workflows/sphinx_render_docs.yml
@@ -18,7 +18,7 @@ jobs:
     - name: Setup Python
       uses: actions/setup-python@v5
       with:
-        python-version: '3.11'
+        python-version: '3.12'
     - uses: actions/checkout@v4
     - name: Install sphinx and build documentation with sphinx
       run: |
diff --git a/materialdatabase/processing/complex_permeability.py b/materialdatabase/processing/complex_permeability.py
index 34603d8..0fcc73a 100644
--- a/materialdatabase/processing/complex_permeability.py
+++ b/materialdatabase/processing/complex_permeability.py
@@ -199,13 +199,13 @@ def fit_losses(self,
         self.params_pv = popt_pv
 
         # print optimal parameters
-        logging.info(popt_pv)
+        logger.info(popt_pv)
 
         # Check fit quality
         fit_function = self.pv_fit_function.get_function()
         pv_pred = fit_function((fit_data["f"].to_numpy(), fit_data["T"].to_numpy(), fit_data["b"].to_numpy()), *popt_pv)
         rel_error = abs(pv_pred - pv) / pv
-        logging.info(f"MRE = {np.mean(rel_error)}")
+        logger.info(f"MRE = {np.mean(rel_error)}")
 
         return popt_pv
 
diff --git a/pyproject.toml b/pyproject.toml
index 711a9ee..5c8edac 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ authors = [
 ]
 description = "A database for ferrite core materials to store datasheet information and self-measured data."
 readme = "README.rst"
-requires-python = ">=3.11"
+requires-python = ">=3.12"
 classifiers = [
     "Programming Language :: Python :: 3",
     "License :: OSI Approved :: MIT License",
@@ -76,7 +76,7 @@ line-ending = "auto"
 
 
 [tool.mypy]
-python_version = "3.11"
+python_version = "3.12"
 warn_return_any = true
 warn_unused_configs = true
 disallow_incomplete_defs = true