diff --git a/install-deps b/install-deps
index b1d5a4d44..d5b6cd6f5 100755
--- a/install-deps
+++ b/install-deps
@@ -93,7 +93,7 @@ if [[ `uname` == 'Darwin' ]]; then
     brew install git readline cmake wget
     brew install libjpeg imagemagick zeromq graphicsmagick openssl
     brew link readline --force
-    brew cask install xquartz
+    brew install --cask xquartz
     brew list -1 | grep -q "^gnuplot\$" && brew remove gnuplot
     brew install gnuplot --with-wxmac --with-cairo --with-pdflib-lite --with-x11 --without-lua
     brew install qt || true