diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 60dad6a8..74bae6e5 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -122,7 +122,10 @@ jobs:
           pytest --cov=emg3d
 
       - name: Coveralls
-        uses: coverallsapp/github-action@v2
+        # [pin v20201129]
+        uses: AndreMiras/coveralls-python-action@f5fd5c309b39d01599fb92c72d4f7409ea78aec9
+        # v Did not work when tried; final coverage was wrong v
+        # uses: coverallsapp/github-action@v2
         with:
           parallel: true
           flag-name: ${{ matrix.case.python-version }} ${{ matrix.case.name }} (${{ matrix.case.os }})
@@ -133,7 +136,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Coveralls Finished
-      uses: coverallsapp/github-action@v2
+      # [pin v20201129]
+      uses: AndreMiras/coveralls-python-action@f5fd5c309b39d01599fb92c72d4f7409ea78aec9
+      # v Did not work when tried; final coverage was wrong v
+      # uses: coverallsapp/github-action@v2
       with:
         parallel-finished: true