diff --git a/homebrew-update-notifier.sh b/homebrew-update-notifier.sh
old mode 100644
new mode 100755
index 3ef95be..66e280b
--- a/homebrew-update-notifier.sh
+++ b/homebrew-update-notifier.sh
@@ -1,25 +1,30 @@
 #!/bin/bash
 #
-# Notify of MacPort updates via Growl on Mac OS X
+# Notify of Homebrew updates via Growl on Mac OS X
+#
+# Original Author: Chris Streeter http://www.chrisstreeter.com
+# Original Homepage: https://github.com/streeter/dotfiles/blob/master/bin/port-update-notifier
+#
+# Ported to Homebrew by: Andrew Davidson http://amdavidson.com
+# Homepage: http://github.com/amdavidson/homebrew-update-notifier
 #
-# Author: Chris Streeter http://www.chrisstreeter.com
 # Requires: Growl Notify Extra to be installed (but fails gracefully). Info
 #       about how to get the extra is at http://growl.info/extras.php
 
 
-TERM_APP='/Applications/Terminal.app'
-PORT_EXEC='/opt/local/bin/port'
+TERM_APP='/Applications/Utilities/Terminal.app'
+BREW_EXEC='/usr/local/bin/brew'
 GROWL_NOTIFY='/usr/local/bin/growlnotify'
-GROWL_TITLE="MacPort Update(s) Available"
-GROWL_ARGS="-n 'MacPorts' -d $GROWL_NOTIFY -a $PORT_EXEC"
+GROWL_TITLE="Homebrew Update(s) Available"
+  GROWL_ARGS="-n 'MacPorts' -d $GROWL_NOTIFY -a $BREW_EXEC"
 
-$PORT_EXEC sync 2>&1 > /dev/null
-outdated=`$PORT_EXEC outdated`
+$BREW_EXEC update 2>&1 > /dev/null
+outdated=`$BREW_EXEC outdated`
 
-if echo $outdated | grep -q 'No installed ports are outdated.' ; then
+if [ -z $outdated ] ; then
     if [ -e $GROWL_NOTIFY ]; then
         # No updates available
-        $GROWL_NOTIFY $GROWL_ARGS -m '' -t "No MacPort Updates Available"
+        $GROWL_NOTIFY $GROWL_ARGS -m '' -t "No Homebrew Updates Available"
     fi
 else
     # We've got an outdated port or two
@@ -37,6 +42,6 @@ $message"
 $message"
         fi
         # Send to growlnotify
-        echo "$message" | $GROWL_NOTIFY $GROWL_ARGS -s -t $GROWL_TITLE
+        echo "$message" | $GROWL_NOTIFY $GROWL_ARGS -t $GROWL_TITLE
     fi
 fi
\ No newline at end of file