diff --git a/.github/workflows/actions.yaml b/.github/workflows/actions.yaml
index 75fd1f8..7f75a70 100644
--- a/.github/workflows/actions.yaml
+++ b/.github/workflows/actions.yaml
@@ -4,9 +4,11 @@ on: [push]
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     strategy:
+      fail-fast: false
       matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
         python-version: ["3.9", "3.10", "3.11", "3.12"]
 
     steps:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e8dea5a..58a7019 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+### v0.5.1 -- September 28, 2025 -- Maintenance release
+
+Set minimum scikit-learn version to 1.6.0.
+Function `check_estimator` requires usage of `validate_data` which was introduced in 1.6.0
+
 ### v0.5.0 -- September 8, 2025 -- Maintenance release
 
 * Python 3.9+
diff --git a/README.md b/README.md
index 6c5013c..7afe3ce 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ Convenient way to automate OOF computation, prediction and bagging using any num
     * Python 3.9+, [unofficial support for Python 2.7 and 3.4](https://github.com/vecxoz/vecstack/blob/master/PY2.md)
     * Win, Linux, Mac
     * [MIT license](https://github.com/vecxoz/vecstack/blob/master/LICENSE.txt)
-    * Depends on **numpy**, **scipy**, **scikit-learn>=0.18**
+    * Depends on **numpy**, **scipy**, **scikit-learn>=1.6.0**
 
 # Get started
 * [FAQ](https://github.com/vecxoz/vecstack#stacking-faq)
diff --git a/setup.py b/setup.py
index 19eca14..96dc82a 100644
--- a/setup.py
+++ b/setup.py
@@ -9,7 +9,7 @@
 '''
 
 setup(name='vecstack',
-      version='0.5.0',
+      version='0.5.1',
       description='Python package for stacking (machine learning technique)',
       long_description=long_desc,
       classifiers=[
@@ -41,7 +41,7 @@
       install_requires=[
           'numpy',
           'scipy',
-          'scikit-learn>=0.18'
+          'scikit-learn>=1.6.0'
       ],
       extras_require={
           'test': [
diff --git a/vecstack/__init__.py b/vecstack/__init__.py
index 80def9b..a3d26ec 100644
--- a/vecstack/__init__.py
+++ b/vecstack/__init__.py
@@ -38,7 +38,7 @@
 
 __author__ = 'Igor Ivanov > kaggle.com/vecxoz'
 __license__ = 'MIT'
-__version__ = '0.5.0'
+__version__ = '0.5.1'
 
 __all__ = ['stacking', 'StackingTransformer']