diff --git a/.github/workflows/c-cpp.yml b/.github/workflows/c-cpp.yml
index ed7037f..fcb8970 100644
--- a/.github/workflows/c-cpp.yml
+++ b/.github/workflows/c-cpp.yml
@@ -32,6 +32,9 @@ jobs:
     - name: ln Mac
       if: ${{ startsWith(matrix.target, 'macos') }}
       run: ln -s Makefile.FreeBSD Makefile
+    - name: Mac libraries
+      if: ${{ startsWith(matrix.target, 'macos') }}
+      run: brew install openssl
     - name: ln Windows
       if: ${{ startsWith(matrix.target, 'windows') }}
       run: copy Makefile.win Makefile