diff --git a/.github/install-dependencies.sh b/.github/install-dependencies.sh
index 3e030d4..3b35497 100755
--- a/.github/install-dependencies.sh
+++ b/.github/install-dependencies.sh
@@ -9,6 +9,10 @@ case "$runner" in
     ;;
   'macos-latest')
     brew install meson ninja tree
+    # install fortran compiler:
+    brew install gcc
+    brew unlink gcc
+    brew link gcc
     ;;
   *)
     exit 1