diff --git a/.github/workflows/custom/before-install/action.yml b/.github/workflows/custom/before-install/action.yml
index fd52fc5a4e..3778a28ca8 100644
--- a/.github/workflows/custom/before-install/action.yml
+++ b/.github/workflows/custom/before-install/action.yml
@@ -7,3 +7,9 @@ runs:
       run: |
         echo '_R_CHECK_PKG_SIZES_=FALSE' | tee -a $GITHUB_ENV
       shell: bash
+
+    - name: Install GLPK on macOS
+      if: runner.os == 'macOS'
+      run: |
+        brew install glpk
+      shell: bash