diff --git a/.github/workflows/ci_tests.yml b/.github/workflows/ci_tests.yml
index 00c07431..b8e2b1b0 100644
--- a/.github/workflows/ci_tests.yml
+++ b/.github/workflows/ci_tests.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         platform: [windows-latest, macos-latest, ubuntu-latest]
-        python-version: ["3.11", "3.14"]
+        python-version: ["3.12", "3.x"]
     runs-on: ${{ matrix.platform }}
 
     steps:
@@ -55,4 +55,4 @@ jobs:
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         files: ./coverage.xml
-      if: matrix.platform == 'ubuntu-latest'
+      if: matrix.platform == 'ubuntu-latest' && matrix.python-version == '3.x'
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 47cdc51d..9e76dcda 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -19,7 +19,7 @@ jobs:
     - name: Set up python
       uses: actions/setup-python@v6
       with:
-        python-version: 3.13
+        python-version: 3.x
 
     - name: Install dependencies / build sdist
       run: |
diff --git a/pyproject.toml b/pyproject.toml
index 2d36dbba..e0e665e3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ build-backend = "setuptools.build_meta"
 name = "petab"
 dynamic = ["version", "readme"]
 description = "Parameter estimation tabular data"
-requires-python = ">=3.11"
+requires-python = ">=3.12"
 dependencies = [
     "numpy>=1.15.1",
     "pandas>=1.2.0",