diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 07a56ad..1656e97 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -24,7 +24,7 @@ jobs:
           python-version: '3.8'
 
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.0.1
+        uses: pypa/cibuildwheel@v2.3.1
 
       - uses: actions/upload-artifact@v2
         with:
diff --git a/sklearn_pmml_model/__init__.py b/sklearn_pmml_model/__init__.py
index 622e880..17501be 100644
--- a/sklearn_pmml_model/__init__.py
+++ b/sklearn_pmml_model/__init__.py
@@ -9,4 +9,4 @@
 
 # License: BSD 2-Clause
 
-__version__ = '0.0.20'
+__version__ = '0.0.21'