diff --git a/.github/workflows/check-links.yml b/.github/workflows/check-links.yml
index 96e8b860d4..8efc74b738 100644
--- a/.github/workflows/check-links.yml
+++ b/.github/workflows/check-links.yml
@@ -23,9 +23,10 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
+        pip install "mistune<3.1"  # a newer version is incompatible with nbconvert
         pip install pytest pytest-check-links
 
     - name: Check links
       run: |
         pytest --check-links README.md --check-links-ignore "http*"
-        pytest --check-links tutorials --check-links-ignore "http*"
\ No newline at end of file
+        pytest --check-links tutorials --check-links-ignore "http*"