diff --git a/.github/workflows/pytest.yaml b/.github/workflows/pytest.yaml
index 77ac59e49..a35fd0c97 100644
--- a/.github/workflows/pytest.yaml
+++ b/.github/workflows/pytest.yaml
@@ -88,7 +88,7 @@ jobs:
 
         # TEMPORARY Work around dask v2024.11.0;
         # see https://github.com/khaeru/genno/issues/149
-        pip install "dask != 2024.11.0"
+        pip install "dask < 2024.11.0"
 
     - name: Run test suite using pytest
       env:
@@ -172,7 +172,7 @@ jobs:
 
         # TEMPORARY Work around dask v2024.11.0;
         # see https://github.com/khaeru/genno/issues/149
-        pip install "dask != 2024.11.0"
+        pip install "dask < 2024.11.0"
 
     - name: Install R dependencies and tutorial requirements
       run: |