diff --git a/.github/workflows/pypi_install.yml b/.github/workflows/pypi_install.yml
index 79e5581db..52ea2b10b 100644
--- a/.github/workflows/pypi_install.yml
+++ b/.github/workflows/pypi_install.yml
@@ -14,7 +14,7 @@ jobs:
       - name: Setup python
         uses: actions/setup-python@v5
         with:
-          python-version: "3.10"
+          python-version: "3.12"
       - name: Checkout repo
         uses: actions/checkout@v4
       - name: Install dependencies
diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index 0cba06e6d..39829fb64 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -21,11 +21,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.10", "3.11"]
+        python-version: ["3.10", "3.11", "3.12"]
         test: ["coveralls", "pytest"]
         # Installation on py3.10 is rather slow at the moment
         exclude:
-          - python-version: "3.11"
+          - python-version: "3.12"
             test: coveralls
     steps:
       - name: Checkout repo
@@ -41,6 +41,9 @@ jobs:
         run: pip install git+https://github.com/XENONnT/base_environment.git@el7.2025.01.3 --force-reinstall
       - name: Install requirements for Python 3.11
         if: matrix.python-version == '3.11'
+        run: pip install git+https://github.com/XENONnT/base_environment.git@el8.2026.02.2 --force-reinstall
+      - name: Install requirements for Python 3.12
+        if: matrix.python-version == '3.12'
         run: pip install git+https://github.com/XENONnT/base_environment.git --force-reinstall
       - name: Install strax
         run: pip install .
diff --git a/.github/workflows/test_install.yml b/.github/workflows/test_install.yml
index 1306c9c28..2e28f9f11 100644
--- a/.github/workflows/test_install.yml
+++ b/.github/workflows/test_install.yml
@@ -20,7 +20,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.10", "3.11"]
+        python-version: ["3.10", "3.11", "3.12"]
     steps:
       - name: Setup python
         uses: actions/setup-python@v5
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index e884a0ae5..607850c69 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -20,6 +20,7 @@ repos:
     rev: v1.7.6
     hooks:
     -   id: docformatter
+        language_version: python3.12
         additional_dependencies: [tomli]
         args: [--config, pyproject.toml]
 
diff --git a/strax/run_selection.py b/strax/run_selection.py
index e3f328774..e06fb1793 100644
--- a/strax/run_selection.py
+++ b/strax/run_selection.py
@@ -193,7 +193,7 @@ def scan_runs(
             docs = new_docs
         else:
             # Keep only new runs (not found by earlier frontends)
-            mask = ~np.in1d(new_docs["name"], docs["name"])
+            mask = ~np.isin(new_docs["name"], docs["name"])
             if np.any(mask):
                 docs = pd.concat([docs, new_docs[mask]], sort=False)
                 docs.reset_index(drop=True, inplace=True)
@@ -211,7 +211,7 @@ def scan_runs(
         desc="Checking data availability",
         disable=not len(check_available),
     ):
-        self.runs[d + "_available"] = np.in1d(self.runs.name.values, self.list_available(d))
+        self.runs[d + "_available"] = np.isin(self.runs.name.values, self.list_available(d))
 
     return self.runs
 
@@ -305,7 +305,7 @@ def select_runs(
         desc="Checking data availability",
         disable=not len(check_available),
     ):
-        dsets[d + "_available"] = np.in1d(
+        dsets[d + "_available"] = np.isin(
             dsets.name.values, self.list_available(target=d, runs=dsets.name.values)
         )
 
@@ -315,7 +315,7 @@ def select_runs(
     for d in have_available:
         if not d + "_available" in dsets.columns:
             # Get extra availability info from the run db
-            d_available = np.in1d(
+            d_available = np.isin(
                 dsets.name.values, self.list_available(target=d, runs=dsets.name.values)
             )
             # Save both in the context and for this selection using
diff --git a/tests/test_data_reduction.py b/tests/test_data_reduction.py
index 552ea89ab..c50501679 100644
--- a/tests/test_data_reduction.py
+++ b/tests/test_data_reduction.py
@@ -13,7 +13,7 @@ def test_cut_outside_hits(records):
     for r in records:
         r["data"] = 0
         r["data"][: r["length"]] = 1
-        assert np.all(np.in1d(r["data"], [0, 1]))
+        assert np.all(np.isin(r["data"], [0, 1]))
 
     left_extension = 2
     right_extension = 3