diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 161ea48..3305f74 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -38,7 +38,7 @@ jobs:
           override: true          
       - if: matrix.rust == '1.45.0'
         # work-around https://github.com/serde-rs/serde/issues/2255
-        run: cargo update -p serde --precise 1.0.142
+        run: cargo update -p serde --precise 1.0.142 && cargo update -p once_cell --precise 1.10.0
       - name: Check with no feature flags
         run: cargo check --verbose --no-default-features
         continue-on-error: ${{ matrix.allow_failure }}