diff --git a/.github/workflows/make.yml b/.github/workflows/make.yml
index ffe9116..a7ac30b 100644
--- a/.github/workflows/make.yml
+++ b/.github/workflows/make.yml
@@ -63,7 +63,9 @@ jobs:
             outputs: bin share
           - name: macos-gfortran
             runs_on: macos-latest
-            packages: automake libtool 
+            packages: automake libtool
+            cxx: gcc-9
+            f77: gfortran-9
     # The CMake configure and build commands are platform agnostic and should work equally
     # well on Windows or Mac.  You can convert this to a matrix build if you need
     # cross-platform coverage.