diff --git a/.github/workflows/pyMixtComp.yml b/.github/workflows/pyMixtComp.yml
index e3a497674..3299f6185 100644
--- a/.github/workflows/pyMixtComp.yml
+++ b/.github/workflows/pyMixtComp.yml
@@ -28,7 +28,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-latest, ubuntu-20.04, macos-latest]
+        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10"]
 
     steps:
       - name: Checkout MixtComp
@@ -44,10 +45,10 @@ jobs:
         run: |
           brew install cmake boost eigen lcov
           brew install boost-python3
-      - name: Set up Python 3.9
+      - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v4
         with:
-          python-version: '3.9'
+          python-version: ${{ matrix.python-version }}
       - name: Install Tests dependencies
         run: pip install pytest flake8
       - name: Install Other Python Dependencies
diff --git a/pyMixtComp/src/CMakeLists.txt b/pyMixtComp/src/CMakeLists.txt
index 138362a85..f674c88e7 100644
--- a/pyMixtComp/src/CMakeLists.txt
+++ b/pyMixtComp/src/CMakeLists.txt
@@ -9,6 +9,7 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 # boost
 find_package(Boost 1.58 COMPONENTS python numpy REQUIRED)
+add_definitions(-DBOOST_BIND_GLOBAL_PLACEHOLDERS)
 include_directories(${Boost_INCLUDE_DIRS})
 
 # python