c3-lang/libffi

diff --git a/.ci/install.sh b/.ci/install.sh
index 9d50fbc..5f813e5 100755
--- a/.ci/install.sh
+++ b/.ci/install.sh
@@ -6,7 +6,7 @@ if [[ $RUNNER_OS != 'Linux' ]]; then
     # brew update > brew-update.log 2>&1
     # fix an issue with libtool on travis by reinstalling it
     brew uninstall libtool;
-    brew install libtool dejagnu;
+    brew install automake libtool dejagnu;
 
     # Download and extract the rlgl client
     wget -qO - https://rl.gl/cli/rlgl-darwin-amd64.tgz | \