diff --git a/_travis/prepare_osx.sh b/_travis/prepare_osx.sh
index 99b2327d08a28c72f13b811abe3348bac71e5b03..726b0d83626a2a8f19e4a647407c7d9d22e823ea 100755
--- a/_travis/prepare_osx.sh
+++ b/_travis/prepare_osx.sh
@@ -19,4 +19,5 @@
 
 set -o nounset                              # Treat unset variables as an error
 echo "Nothing to do here. The moose.rb formula will install all dependecnies"
+brew update
 brew tap homebrew/science