diff --git a/.npmignore b/.npmignore
index ae6d218..f402445 100644
--- a/.npmignore
+++ b/.npmignore
@@ -2,6 +2,8 @@ examples
 test
 .travis.yml
 .prettierrc
+tsconfig.json
+tslint.json
 src
 !index.js
 !index.d.ts
diff --git a/package.json b/package.json
index f197728..f2a289e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "detect-browser",
-  "version": "4.1.0",
+  "version": "4.3.0",
   "description": "Unpack a browser type and version from the useragent string",
   "main": "index.js",
   "scripts": {
diff --git a/src/index.ts b/src/index.ts
index 34aacc9..d03cec5 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -35,6 +35,7 @@ type Browser =
   | 'kakaotalk'
   | 'samsung'
   | 'silk'
+  | 'miui'
   | 'chrome'
   | 'phantomjs'
   | 'crios'
@@ -95,6 +96,7 @@ const userAgentRules: UserAgentRule[] = [
   ['kakaotalk', /KAKAOTALK\s([0-9\.]+)/],
   ['samsung', /SamsungBrowser\/([0-9\.]+)/],
   ['silk', /\bSilk\/([0-9._-]+)\b/],
+  ['miui', /MiuiBrowser\/([0-9\.]+)$/],
   ['chrome', /(?!Chrom.*OPR)Chrom(?:e|ium)\/([0-9\.]+)(:?\s|$)/],
   ['phantomjs', /PhantomJS\/([0-9\.]+)(:?\s|$)/],
   ['crios', /CriOS\/([0-9\.]+)(:?\s|$)/],
@@ -113,6 +115,7 @@ const userAgentRules: UserAgentRule[] = [
   ['facebook', /FBAV\/([0-9\.]+)/],
   ['instagram', /Instagram\s([0-9\.]+)/],
   ['ios-webview', /AppleWebKit\/([0-9\.]+).*Mobile/],
+  ['ios-webview', /AppleWebKit\/([0-9\.]+).*Gecko\)$/],
   ['searchbot', SEARCHBOX_UA_REGEX],
 ];
 const operatingSystemRules: OperatingSystemRule[] = [
diff --git a/test/logic.js b/test/logic.js
index 680cff2..cad41b5 100644
--- a/test/logic.js
+++ b/test/logic.js
@@ -16,6 +16,11 @@ test('detects Chrome', function(t) {
     { name: 'chrome', version: '41.0.2228', os: 'Windows 7' }
   );
 
+  assertAgentString(t,
+    'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.119 Safari/537.36',
+    { name: 'chrome', version: '72.0.3626', os: 'Windows 10' }
+  )
+
   t.end();
 });
 
@@ -233,6 +238,16 @@ test('detects native iOS WebView browser', function (t) {
     { name: 'ios-webview', version: '605.1.15', os: 'iOS' }
   );
 
+  assertAgentString(t,
+    'Mozilla/5.0 (iPhone; CPU iPhone OS 12_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/16B92',
+    { name: 'ios-webview', version: '605.1.15', os: 'iOS' }
+  );
+
+  assertAgentString(t,
+    'Mozilla/5.0 (iPhone; CPU iPhone OS 12_1_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko)',
+    { name: 'ios-webview', version: '605.1.15', os: 'iOS' }
+  );
+
   t.end();
 });
 
@@ -277,7 +292,7 @@ test('detects Opera-Mini', function (t) {
     'Opera/9.80 (Android; Opera Mini/8.0.1807/36.1609; U; en) Presto/2.12.423 Version/12.16',
     { name: 'opera-mini', version: '12.16.0', os: 'Android OS' }
   );
-  
+
   assertAgentString(t,
     'Opera/9.80 (BlackBerry; Opera Mini/6.5.27548/27.2020; U; en) Presto/2.8.119 Version/11.10',
     { name: 'opera-mini', version: '11.10.0', os: 'BlackBerry OS' }
@@ -309,7 +324,7 @@ test('detects Chrome OS', function (t) {
     'Mozilla/5.0 (X11; CrOS x86_64 10895.78.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.120 Safari/537.36',
     { name: 'chrome', version: '69.0.3497', os: 'Chrome OS' }
   );
-  
+
   assertAgentString(t,
     'Mozilla/5.0 (X11; U; CrOS i686 9.10.0; en-US) AppleWebKit/532.5 (KHTML, like Gecko) Gecko/20100101 Firefox/29.0',
     { name: 'firefox', version: '29.0.0', os: 'Chrome OS' }
@@ -317,6 +332,14 @@ test('detects Chrome OS', function (t) {
   t.end();
 });
 
+test('detects miui', function(t) {
+  assertAgentString(t,
+    'Mozilla/5.0 (Linux; U; Android 7.0; en-us; MI 5 Build/NRD90M) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/53.0.2785.146 Mobile Safari/537.36 XiaoMi/MiuiBrowser/9.0.3',
+    { name: 'miui', version: '9.0.3', os: 'Android OS' }
+  );
+  t.end();
+});
+
 test('handles no browser', function(t) {
     assertAgentString(t,
         null,