diff --git a/upgrade b/upgrade
index 2cfc36c..ddba41a 100755
--- a/upgrade
+++ b/upgrade
@@ -20,7 +20,7 @@ def get_url():
 
 def run(*args):
     print 'RUNING:', ' '.join(args)
-    summary = []
+    summary = set()
     process = subprocess.Popen(args, stdout=subprocess.PIPE,
         stderr=subprocess.PIPE, bufsize=1)
     #for line in iter(process.stdout.readline, b''):
@@ -28,16 +28,16 @@ def run(*args):
         line = line.strip()
         if 'ERROR' in line:
             line = t.red(line)
-            summary.append(line)
+            summary.add(line)
         elif 'WARNING' in line:
             line = t.yellow(line)
-            summary.append(line)
+            summary.add(line)
         print line
     process.stdout.close()
     process.wait()
     if summary:
         print t.bold('\nWARNING AND ERROR SUMMARY:')
-        print '\n'.join(summary)
+        print '\n'.join(sorted(list(summary)))
     return process.returncode
 
 def execute(query, *args, **kwargs):