diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 5d82d59..c6b0323 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -5,17 +5,17 @@ name: Python package
 
 on:
   push:
-    branches: [ master ]
   pull_request:
-    branches: [ master ]
 
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     strategy:
+      fail-fast: false
       matrix:
-        python-version: [3.6, 3.7, 3.8]
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        python-version: [3.6, 3.7, 3.8, 3.9, '3.10']
 
     steps:
     - uses: actions/checkout@v2
@@ -26,16 +26,16 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install flake8 pytest
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+        pip install -r requirements-dev.txt
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names
         flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
         # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
         flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
-    - name: Test with pytest
+    - name: Test with pytest and report coverage
       run: |
         cd tests
-        pytest
+        coverage run -m pytest
+        coverage report -m
         cd ..
diff --git a/.gitignore b/.gitignore
index 8fd2ab4..e4a82b3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -108,3 +108,6 @@ ENV/
 
 # mypy
 .mypy_cache/
+
+# macOS
+*.DS_Store
\ No newline at end of file
diff --git a/requirements-dev.txt b/requirements-dev.txt
new file mode 100755
index 0000000..cab926c
--- /dev/null
+++ b/requirements-dev.txt
@@ -0,0 +1,8 @@
+numpy
+pandas
+python-dateutil
+requests
+requests-mock
+coverage
+pytest
+flake8
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index 7bcaab5..dfbd325 100755
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,8 +1,4 @@
-coverage==5.0
-numpy>=1.19.1
-pandas>=1.1.1
-python-dateutil==2.8.1
-pytest==3.5.0
-requests>=2.20.0
-requests-mock==1.7.0
-Sphinx==3.3.1
+numpy
+pandas
+python-dateutil
+requests