diff --git a/lib/updater.js b/lib/updater.js
index a5d9fb5..f509586 100644
--- a/lib/updater.js
+++ b/lib/updater.js
@@ -24,11 +24,23 @@ module.exports = function (pkg) {
     }
 
     function isNewer(latest, myPkg) {
-      var m = /^(v)?(\d+)\.(\d+)\.(\d+)(.*)/.exec(latest.version);
-      var n = /^(v)?(\d+)\.(\d+)\.(\d+)(.*)/.exec(myPkg.version);
+      //console.log('sort result:', sortLatest(latest, myPkg));
+      return sortLatest(latest, myPkg) < 0;
+    }
+    function sortLatest(latest, myPkg) {
+      var m = /^(v)?(\d+)\.(\d+)\.(\d+)(.*)/.exec(latest);
+      var n = /^(v)?(\d+)\.(\d+)\.(\d+)(.*)/.exec(myPkg);
+      //console.log('m', m);
+      //console.log('n', n);
       if (!m) {
+        if (!n) {
+          return 0;
+        }
         return 1;
+      } else if (!n) {
+        return -1;
       }
+
       if (parseInt(m[2], 10) > parseInt(n[2], 10)) {
         return -1;
       } else if (parseInt(m[2], 10) === parseInt(n[2], 10)) {
@@ -88,7 +100,7 @@ module.exports = function (pkg) {
         }
       });
       if (!next || !isNewer(next.version, pkg.version)) {
-        console.log('DEBUG can\'t upgrade from', pkg.version, 'in channel', chan);
+        //console.log('DEBUG can\'t upgrade from', pkg.version, 'in channel', chan);
         return;
       }
       console.log('Upgrade Available: ' + next.version + ' in \'' + next.channel + '\'channel');