diff --git a/.github/workflows/nightly_docs.yml b/.github/workflows/nightly_docs.yml
index 9eef21ce8..38830e56f 100644
--- a/.github/workflows/nightly_docs.yml
+++ b/.github/workflows/nightly_docs.yml
@@ -25,6 +25,10 @@ jobs:
             ~/.cargo/git
             target
           key: nightly-docs-${{ hashFiles('**/Cargo.toml','**/Cargo.lock') }}
+      - name: Downgrade Python to 3.8.18
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.8.18'
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@nightly
         with: