diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 7251bc9..3368608 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -37,7 +37,7 @@ jobs:
             markdown-full-yaml-metadata
             PyAudio
             pytest
-            pytest-cov
+            pytest-cov<4
             coveralls
       - name: Unit tests
         run: |