diff --git a/.github/workflows/capi.yaml b/.github/workflows/capi.yaml
index a1f3f972..fb68e879 100644
--- a/.github/workflows/capi.yaml
+++ b/.github/workflows/capi.yaml
@@ -52,7 +52,8 @@ jobs:
                   --format lcov > lcov.info
 
       - name: Upload to codecov.io
-        uses: codecov/codecov-action@v3
+        # version 3.1.5 upgrades to Node 20 (https://github.com/codecov/codecov-action/issues/1230), which breaks inside our container
+        uses: codecov/codecov-action@v3.1.4
         with:
           token: ${{secrets.CODECOV_TOKEN}}
           flags: capi
diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index d2dd409e..8e84db28 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -82,7 +82,8 @@ jobs:
                 --format lcov > lcov.info
 
     - name: Upload to codecov.io
-      uses: codecov/codecov-action@v3
+      # version 3.1.5 upgrades to Node 20 (https://github.com/codecov/codecov-action/issues/1230), which breaks inside our container
+      uses: codecov/codecov-action@v3.1.4
       with:
         token: ${{secrets.CODECOV_TOKEN}}
         flags: rust