diff --git a/script/bootstrap.sh b/script/bootstrap.sh
index 4f3b8e7c5..67e3d2dd0 100755
--- a/script/bootstrap.sh
+++ b/script/bootstrap.sh
@@ -109,6 +109,7 @@ elif [ "$(uname)" = "Darwin" ]; then
     echo "OS is Darwin"
 
     ## Install packages
+    brew update
     brew install coreutils \
                  readline \
                  cmake \