diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index 732a938..84c1c29 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -21,7 +21,7 @@ jobs:
         pip install -U pip
         pip install git+https://github.com/labstreaminglayer/liblsl-Python.git 
         pip install -r requirements.txt
-        pip install coverage
+        pip install coverage==4.5.4
         pip install pytest-cov
         pip install pytest
         pip install .
@@ -37,4 +37,4 @@ jobs:
     - name: Static type checking
       run: |
         pip install mypy
-        mypy
\ No newline at end of file
+        mypy