diff --git a/bowser.js b/bowser.js
index cdfe3b6..3b4c03d 100644
--- a/bowser.js
+++ b/bowser.js
@@ -118,7 +118,7 @@
       , blackberry: t
       , version: versionIdentifier || getFirstMatch(/blackberry[\d]+\/(\d+(\.\d+)?)/i)
       }
-    } 
+    }
     else if (/(web|hpw)os/i.test(ua)) {
       result = {
         name: 'WebOS'
@@ -203,19 +203,19 @@
 
     // Graded Browser Support
     // http://developer.yahoo.com/yui/articles/gbs
-    if ((result.msie && result.version >= 9) ||
+    if ((result.msie && result.version >= 10) ||
         (result.chrome && result.version >= 20) ||
-        (result.firefox && result.version >= 10.0) ||
-        (result.safari && result.version >= 5) ||
+        (result.firefox && result.version >= 20.0) ||
+        (result.safari && result.version >= 6) ||
         (result.opera && result.version >= 10.0) ||
         (result.ios && result.osversion && result.osversion.split(".")[0] >= 6)
         ) {
       result.a = t;
     }
-    else if ((result.msie && result.version < 9) ||
+    else if ((result.msie && result.version < 10) ||
         (result.chrome && result.version < 20) ||
-        (result.firefox && result.version < 10.0) ||
-        (result.safari && result.version < 5) ||
+        (result.firefox && result.version < 20.0) ||
+        (result.safari && result.version < 6) ||
         (result.opera && result.version < 10.0) ||
         (result.ios && result.osversion && result.osversion.split(".")[0] < 6)
         ) {
diff --git a/bowser.min.js b/bowser.min.js
index 576e1b5..bbd132e 100644
--- a/bowser.min.js
+++ b/bowser.min.js
@@ -3,4 +3,4 @@
   * https://github.com/ded/bowser
   * MIT License | (c) Dustin Diaz 2014
   */
-!function(e,t){typeof module!="undefined"&&module.exports?module.exports.browser=t():typeof define=="function"?define(t):this[e]=t()}("bowser",function(){function t(t){function n(e){var n=t.match(e);return n&&n.length>1&&n[1]||""}var r=n(/(ipod|iphone|ipad)/i).toLowerCase(),i=/like android/i.test(t),s=!i&&/android/i.test(t),o=n(/version\/(\d+(\.\d+)?)/i),u=/tablet/i.test(t),a=!u&&/[^-]mobi/i.test(t),f;/opera|opr/i.test(t)?f={name:"Opera",opera:e,version:o||n(/(?:opera|opr)[\s\/](\d+(\.\d+)?)/i)}:/windows phone/i.test(t)?f={name:"Windows Phone",windowsphone:e,msie:e,version:n(/iemobile\/(\d+(\.\d+)?)/i)}:/msie|trident/i.test(t)?f={name:"Internet Explorer",msie:e,version:n(/(?:msie |rv:)(\d+(\.\d+)?)/i)}:/chrome|crios|crmo/i.test(t)?f={name:"Chrome",chrome:e,version:n(/(?:chrome|crios|crmo)\/(\d+(\.\d+)?)/i)}:r?(f={name:r=="iphone"?"iPhone":r=="ipad"?"iPad":"iPod"},o&&(f.version=o)):/sailfish/i.test(t)?f={name:"Sailfish",sailfish:e,version:n(/sailfish\s?browser\/(\d+(\.\d+)?)/i)}:/seamonkey\//i.test(t)?f={name:"SeaMonkey",seamonkey:e,version:n(/seamonkey\/(\d+(\.\d+)?)/i)}:/firefox|iceweasel/i.test(t)?(f={name:"Firefox",firefox:e,version:n(/(?:firefox|iceweasel)[ \/](\d+(\.\d+)?)/i)},/\((mobile|tablet);[^\)]*rv:[\d\.]+\)/i.test(t)&&(f.firefoxos=e)):/silk/i.test(t)?f={name:"Amazon Silk",silk:e,version:n(/silk\/(\d+(\.\d+)?)/i)}:s?f={name:"Android",version:o}:/phantom/i.test(t)?f={name:"PhantomJS",phantom:e,version:n(/phantomjs\/(\d+(\.\d+)?)/i)}:/blackberry|\bbb\d+/i.test(t)||/rim\stablet/i.test(t)?f={name:"BlackBerry",blackberry:e,version:o||n(/blackberry[\d]+\/(\d+(\.\d+)?)/i)}:/(web|hpw)os/i.test(t)?(f={name:"WebOS",webos:e,version:o||n(/w(?:eb)?osbrowser\/(\d+(\.\d+)?)/i)},/touchpad\//i.test(t)&&(f.touchpad=e)):/bada/i.test(t)?f={name:"Bada",bada:e,version:n(/dolfin\/(\d+(\.\d+)?)/i)}:/tizen/i.test(t)?f={name:"Tizen",tizen:e,version:n(/(?:tizen\s?)?browser\/(\d+(\.\d+)?)/i)||o}:/safari/i.test(t)?f={name:"Safari",safari:e,version:o}:f={},/(apple)?webkit/i.test(t)?(f.name=f.name||"Webkit",f.webkit=e,!f.version&&o&&(f.version=o)):!f.opera&&/gecko\//i.test(t)&&(f.name=f.name||"Gecko",f.gecko=e,f.version=f.version||n(/gecko\/(\d+(\.\d+)?)/i)),s||f.silk?f.android=e:r&&(f[r]=e,f.ios=e);var l="";r?(l=n(/os (\d+([_\s]\d+)*) like mac os x/i),l=l.replace(/[_\s]/g,".")):s?l=n(/android[ \/-](\d+(\.\d+)*)/i):f.windowsphone?l=n(/windows phone (?:os)?\s?(\d+(\.\d+)*)/i):f.webos?l=n(/(?:web|hpw)os\/(\d+(\.\d+)*)/i):f.blackberry?l=n(/rim\stablet\sos\s(\d+(\.\d+)*)/i):f.bada?l=n(/bada\/(\d+(\.\d+)*)/i):f.tizen&&(l=n(/tizen[\/\s](\d+(\.\d+)*)/i)),l&&(f.osversion=l);var c=l.split(".")[0];if(u||r=="ipad"||s&&(c==3||c==4&&!a)||f.silk)f.tablet=e;else if(a||r=="iphone"||r=="ipod"||s||f.blackberry||f.webos||f.bada)f.mobile=e;return f.msie&&f.version>=9||f.chrome&&f.version>=20||f.firefox&&f.version>=10||f.safari&&f.version>=5||f.opera&&f.version>=10||f.ios&&f.osversion&&f.osversion.split(".")[0]>=6?f.a=e:f.msie&&f.version<9||f.chrome&&f.version<20||f.firefox&&f.version<10||f.safari&&f.version<5||f.opera&&f.version<10||f.ios&&f.osversion&&f.osversion.split(".")[0]<6?f.c=e:f.x=e,f}var e=!0,n=t(typeof navigator!="undefined"?navigator.userAgent:"");return n._detect=t,n})
\ No newline at end of file
+!function(e,t){typeof module!="undefined"&&module.exports?module.exports.browser=t():typeof define=="function"?define(t):this[e]=t()}("bowser",function(){function t(t){function n(e){var n=t.match(e);return n&&n.length>1&&n[1]||""}var r=n(/(ipod|iphone|ipad)/i).toLowerCase(),i=/like android/i.test(t),s=!i&&/android/i.test(t),o=n(/version\/(\d+(\.\d+)?)/i),u=/tablet/i.test(t),a=!u&&/[^-]mobi/i.test(t),f;/opera|opr/i.test(t)?f={name:"Opera",opera:e,version:o||n(/(?:opera|opr)[\s\/](\d+(\.\d+)?)/i)}:/windows phone/i.test(t)?f={name:"Windows Phone",windowsphone:e,msie:e,version:n(/iemobile\/(\d+(\.\d+)?)/i)}:/msie|trident/i.test(t)?f={name:"Internet Explorer",msie:e,version:n(/(?:msie |rv:)(\d+(\.\d+)?)/i)}:/chrome|crios|crmo/i.test(t)?f={name:"Chrome",chrome:e,version:n(/(?:chrome|crios|crmo)\/(\d+(\.\d+)?)/i)}:r?(f={name:r=="iphone"?"iPhone":r=="ipad"?"iPad":"iPod"},o&&(f.version=o)):/sailfish/i.test(t)?f={name:"Sailfish",sailfish:e,version:n(/sailfish\s?browser\/(\d+(\.\d+)?)/i)}:/seamonkey\//i.test(t)?f={name:"SeaMonkey",seamonkey:e,version:n(/seamonkey\/(\d+(\.\d+)?)/i)}:/firefox|iceweasel/i.test(t)?(f={name:"Firefox",firefox:e,version:n(/(?:firefox|iceweasel)[ \/](\d+(\.\d+)?)/i)},/\((mobile|tablet);[^\)]*rv:[\d\.]+\)/i.test(t)&&(f.firefoxos=e)):/silk/i.test(t)?f={name:"Amazon Silk",silk:e,version:n(/silk\/(\d+(\.\d+)?)/i)}:s?f={name:"Android",version:o}:/phantom/i.test(t)?f={name:"PhantomJS",phantom:e,version:n(/phantomjs\/(\d+(\.\d+)?)/i)}:/blackberry|\bbb\d+/i.test(t)||/rim\stablet/i.test(t)?f={name:"BlackBerry",blackberry:e,version:o||n(/blackberry[\d]+\/(\d+(\.\d+)?)/i)}:/(web|hpw)os/i.test(t)?(f={name:"WebOS",webos:e,version:o||n(/w(?:eb)?osbrowser\/(\d+(\.\d+)?)/i)},/touchpad\//i.test(t)&&(f.touchpad=e)):/bada/i.test(t)?f={name:"Bada",bada:e,version:n(/dolfin\/(\d+(\.\d+)?)/i)}:/tizen/i.test(t)?f={name:"Tizen",tizen:e,version:n(/(?:tizen\s?)?browser\/(\d+(\.\d+)?)/i)||o}:/safari/i.test(t)?f={name:"Safari",safari:e,version:o}:f={},/(apple)?webkit/i.test(t)?(f.name=f.name||"Webkit",f.webkit=e,!f.version&&o&&(f.version=o)):!f.opera&&/gecko\//i.test(t)&&(f.name=f.name||"Gecko",f.gecko=e,f.version=f.version||n(/gecko\/(\d+(\.\d+)?)/i)),s||f.silk?f.android=e:r&&(f[r]=e,f.ios=e);var l="";r?(l=n(/os (\d+([_\s]\d+)*) like mac os x/i),l=l.replace(/[_\s]/g,".")):s?l=n(/android[ \/-](\d+(\.\d+)*)/i):f.windowsphone?l=n(/windows phone (?:os)?\s?(\d+(\.\d+)*)/i):f.webos?l=n(/(?:web|hpw)os\/(\d+(\.\d+)*)/i):f.blackberry?l=n(/rim\stablet\sos\s(\d+(\.\d+)*)/i):f.bada?l=n(/bada\/(\d+(\.\d+)*)/i):f.tizen&&(l=n(/tizen[\/\s](\d+(\.\d+)*)/i)),l&&(f.osversion=l);var c=l.split(".")[0];if(u||r=="ipad"||s&&(c==3||c==4&&!a)||f.silk)f.tablet=e;else if(a||r=="iphone"||r=="ipod"||s||f.blackberry||f.webos||f.bada)f.mobile=e;return f.msie&&f.version>=10||f.chrome&&f.version>=20||f.firefox&&f.version>=20||f.safari&&f.version>=6||f.opera&&f.version>=10||f.ios&&f.osversion&&f.osversion.split(".")[0]>=6?f.a=e:f.msie&&f.version<10||f.chrome&&f.version<20||f.firefox&&f.version<20||f.safari&&f.version<6||f.opera&&f.version<10||f.ios&&f.osversion&&f.osversion.split(".")[0]<6?f.c=e:f.x=e,f}var e=!0,n=t(typeof navigator!="undefined"?navigator.userAgent:"");return n._detect=t,n})
\ No newline at end of file
diff --git a/src/useragents.js b/src/useragents.js
index 9f4ec7e..2c5e85a 100644
--- a/src/useragents.js
+++ b/src/useragents.js
@@ -257,25 +257,25 @@ module.exports.useragents = {
         safari: true
       , version: '5.1'
       , webkit: true
-      , a: true
+      , c: true
       }
     , 'Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_7; en-us) AppleWebKit/533.21.1 (KHTML, like Gecko) Version/5.0.5 Safari/533.21.1': {
         safari: true
       , version: '5.0'
       , webkit: true
-      , a: true
+      , c: true
       }
     , 'Mozilla/5.0 (Windows; U; Windows NT 5.1; ru-RU) AppleWebKit/533.18.1 (KHTML, like Gecko) Version/5.0.2 Safari/533.18.5': {
         safari: true
       , version: '5.0'
       , webkit: true
-      , a: true
+      , c: true
       }
     , 'Mozilla/5.0 (X11; U; Linux x86_64; en-us) AppleWebKit/531.2+ (KHTML, like Gecko) Version/5.0 Safari/531.2+': {
         safari: true
       , version: '5.0'
       , webkit: true
-      , a: true
+      , c: true
       }
     , 'Mozilla/5.0 (Windows; U; Windows NT 5.0; en-en) AppleWebKit/533.16 (KHTML, like Gecko) Version/4.1 Safari/533.16': {
         safari: true
@@ -330,7 +330,7 @@ module.exports.useragents = {
     , 'Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET CLR 2.0.50727; Media Center PC 6.0)': {
         msie: true
       , version: '9.0'
-      , a: true
+      , c: true
       }
     , 'Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C)': {
         msie: true
@@ -381,7 +381,7 @@ module.exports.useragents = {
       , version: '18.1'
       , mobile: true
       , firefoxos: true
-      , a: true
+      , c: true
       }
     , 'Mozilla/5.0 (Android; Mobile; rv:27.0) Gecko/27.0 Firefox/27.0': {
         gecko: true
@@ -421,25 +421,25 @@ module.exports.useragents = {
         gecko: true
       , firefox: true
       , version: '17.0'
-      , a: true
+      , c: true
       }
     , 'Mozilla/5.0 (X11; Linux x86_64; rv:15.0) Gecko/20120724 Debian Iceweasel/15.0': {
         gecko: true
       , firefox: true
       , version: '15.0'
-      , a: true
+      , c: true
       }
     , 'Mozilla/5.0 (Windows NT 6.2; WOW64; rv:15.0) Gecko/20120910144328 Firefox/15.0.2': {
         gecko: true
       , firefox: true
       , version: '15.0'
-      , a: true
+      , c: true
       }
     , 'Mozilla/5.0 (Windows; U; Windows NT 6.1; WOW64; en-US; rv:2.0.4) Gecko/20120718 AskTbAVR-IDW/3.12.5.17700 Firefox/14.0.1': {
         gecko: true
       , firefox: true
       , version: '14.0'
-      , a: true
+      , c: true
       }
     , 'Mozilla/5.0 (Windows NT 5.1; rv:6.0) Gecko/20100101 Firefox/6.0 FirePHP/0.6': {
         gecko: true
@@ -725,7 +725,7 @@ module.exports.useragents = {
       , msie: true
       , version: '9.0'
       , mobile: true
-      , a: true
+      , c: true
       }
     , 'Mozilla/4.0 (compatible; MSIE 7.0; Windows Phone OS 7.0; Trident/3.1; IEMobile/7.0; Nokia;N70)': {
         windowsphone: true
@@ -931,4 +931,4 @@ module.exports.useragents = {
       , x: true
       }
     }
-};
\ No newline at end of file
+};