diff --git a/.github/workflows/nightly.yaml b/.github/workflows/nightly.yaml
index f79d07617..c084ea4be 100644
--- a/.github/workflows/nightly.yaml
+++ b/.github/workflows/nightly.yaml
@@ -66,9 +66,9 @@ jobs:
         (cd ixmp; pip install .[tests])
         (cd message_ix; pip install .[tests])
 
-        # TEMPORARY Work around unionai-oss/pandera#1685;
-        # see https://github.com/khaeru/genno/issues/140
-        pip install "numpy < 2"
+        # TEMPORARY Work around dask v2024.11.0;
+        # see https://github.com/khaeru/genno/issues/149
+        pip install "dask < 2024.11.0"
 
     - name: Run test suite using pytest
       env:
diff --git a/.github/workflows/pytest.yaml b/.github/workflows/pytest.yaml
index d0206d264..a35fd0c97 100644
--- a/.github/workflows/pytest.yaml
+++ b/.github/workflows/pytest.yaml
@@ -86,9 +86,9 @@ jobs:
         pip install --upgrade "ixmp @ git+https://github.com/iiasa/ixmp.git@main"
         pip install .[tests]
 
-        # TEMPORARY Work around unionai-oss/pandera#1685;
-        # see https://github.com/khaeru/genno/issues/140
-        pip install "numpy < 2"
+        # TEMPORARY Work around dask v2024.11.0;
+        # see https://github.com/khaeru/genno/issues/149
+        pip install "dask < 2024.11.0"
 
     - name: Run test suite using pytest
       env:
@@ -170,9 +170,9 @@ jobs:
         pip install --upgrade "ixmp @ git+https://github.com/iiasa/ixmp.git@main"
         pip install .[tests]
 
-        # TEMPORARY Work around unionai-oss/pandera#1685;
-        # see https://github.com/khaeru/genno/issues/140
-        pip install "numpy < 2"
+        # TEMPORARY Work around dask v2024.11.0;
+        # see https://github.com/khaeru/genno/issues/149
+        pip install "dask < 2024.11.0"
 
     - name: Install R dependencies and tutorial requirements
       run: |