diff --git a/.github/workflows/openssl3.yml b/.github/workflows/openssl3.yml
index 076a494..5504aff 100644
--- a/.github/workflows/openssl3.yml
+++ b/.github/workflows/openssl3.yml
@@ -46,7 +46,7 @@ jobs:
           context: openssl3
           platforms: ${{ matrix.platform }}
           build-args: |
-            MAKE_DEFINES=-j4
+            MAKE_DEFINES=-j$(nproc)
             ${{ (github.event.inputs.build_main == 'true') && env.build-args || null }}
           tags: oqs-ossl3