diff --git a/.github/workflows/build-wheels.yml b/.github/workflows/build-wheels.yml
index 99c9231..05a2b49 100644
--- a/.github/workflows/build-wheels.yml
+++ b/.github/workflows/build-wheels.yml
@@ -44,7 +44,7 @@ jobs:
           echo "PKG_CONFIG_PATH=C:/mingw64/lib/pkgconfig" >> $GITHUB_ENV
 
       - name: Build wheels
-        uses: pypa/cibuildwheel@v3.4.1
+        uses: pypa/cibuildwheel@v4.3.1
         env:
           # All cibuildwheel options are here (nothing "hidden" in pyproject.toml)
           CIBW_SKIP: "*-win32 *i686 cp3??t-*"
diff --git a/.github/workflows/test-linux.yml b/.github/workflows/test-linux.yml
index ed9fe2d..beca64a 100644
--- a/.github/workflows/test-linux.yml
+++ b/.github/workflows/test-linux.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14", "3.15"]
         resolution: ["lowest-direct", "highest"]
         exclude:
           - python-version: "3.12"
@@ -21,7 +21,9 @@ jobs:
           - python-version: "3.13"
             resolution: "lowest-direct"
           - python-version: "3.14"
-            resolution: "lowest-direct"              
+            resolution: "lowest-direct"
+          - python-version: "3.15"
+            resolution: "lowest-direct"
     steps:
       - name: Checkout code
         uses: actions/checkout@v5
diff --git a/pyproject.toml b/pyproject.toml
index cf88c1c..eb0f4b9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
     "Programming Language :: Python :: 3.14",
+    "Programming Language :: Python :: 3.15",
     "Topic :: Scientific/Engineering",
 ]
 
@@ -38,7 +39,7 @@ dev = [
     "meson-python>=0.18.0",
     "pytest>=8.4.1",
     "pytest-cov>=6.2.1",
-    "scipy>=1.10,<1.17",
+    "scipy>=1.10,<1.19",
     "build>=1.5.0",
 ]
 docs = [
diff --git a/tests/test_odr_fit.py b/tests/test_odr_fit.py
index a56c23a..e26a94c 100644
--- a/tests/test_odr_fit.py
+++ b/tests/test_odr_fit.py
@@ -3,8 +3,6 @@
 
 import numpy as np
 import pytest
-from scipy.odr import odr as odrscipy
-from scipy.optimize import curve_fit
 
 from odrpack import OdrStop, odr_fit
 from odrpack.__odrpack import loc_rwork
@@ -677,6 +675,9 @@ def f(x: np.ndarray, beta: np.ndarray) -> np.ndarray:
 @pytest.mark.xfail(reason="Fails in conda-forge::linux_aarch64")
 def test_compare_scipy(case1, case2, case3):
 
+    odrscipy = pytest.importorskip("scipy.odr").odr
+    curve_fit = pytest.importorskip("scipy.optimize").curve_fit
+
     # case1 // scipy.optimize.curve_fit
     sol1 = odr_fit(**case1, task='OLS')
     sol2 = curve_fit(lambda x, *b: case1['f'](x, np.array(b)),