diff --git a/zshrc b/zshrc
index 573450e..31f08e3 100644
--- a/zshrc
+++ b/zshrc
@@ -150,6 +150,7 @@ osx_upgrade_local () {
         print "=== homebrew update ==="
         brew update
         brew upgrade
+        brew cleanup
     fi
     if [ -x /sw/bin/fink ] ; then
         print "=== fink upgrade ==="