diff --git a/.github/actions/install-macos-dependencies/action.yml b/.github/actions/install-macos-dependencies/action.yml
index b19cac1052..3eea3a100c 100644
--- a/.github/actions/install-macos-dependencies/action.yml
+++ b/.github/actions/install-macos-dependencies/action.yml
@@ -27,5 +27,5 @@ runs:
 
     # install amici dependencies
     - name: homebrew
-      run: brew install hdf5 swig gcc libomp boost
+      run: brew install hdf5 swig@4.2.1 gcc libomp boost
       shell: bash