diff --git a/src/enums/ua-parser-enums.d.ts b/src/enums/ua-parser-enums.d.ts
index b41dfc4..70abdc8 100644
--- a/src/enums/ua-parser-enums.d.ts
+++ b/src/enums/ua-parser-enums.d.ts
@@ -152,6 +152,7 @@ export const Browser: Readonly<{
     WHALE: "Whale";
     WOLVIC: "Wolvic";
     YANDEX: "Yandex";
+    ZALO: "Zalo";
 }>;
 export const BrowserType: Readonly<{
     CRAWLER: "crawler";
diff --git a/src/enums/ua-parser-enums.js b/src/enums/ua-parser-enums.js
index 2ae437c..c4e8213 100644
--- a/src/enums/ua-parser-enums.js
+++ b/src/enums/ua-parser-enums.js
@@ -156,7 +156,8 @@ const Browser = Object.freeze({
     WEIBO: 'Weibo',
     WHALE: 'Whale',
     WOLVIC: 'Wolvic',
-    YANDEX: 'Yandex'
+    YANDEX: 'Yandex',
+    ZALO: 'Zalo'
 
     // TODO : test!
 });
diff --git a/src/main/ua-parser.js b/src/main/ua-parser.js
index ae91dbd..d547711 100755
--- a/src/main/ua-parser.js
+++ b/src/main/ua-parser.js
@@ -434,6 +434,8 @@
             ], [VERSION, [NAME, 'TikTok'], [TYPE, INAPP]], [
             /\[(linkedin)app\]/i                                                // LinkedIn App for iOS & Android
             ], [NAME, [TYPE, INAPP]], [
+            /(zalo(?:app)?)[\/\sa-z]*([\w\.-]+)/i                               // Zalo 
+            ], [[NAME, /(.+)/, 'Zalo'], VERSION, [TYPE, INAPP]], [
 
             /(chromium)[\/ ]([-\w\.]+)/i                                        // Chromium
             ], [NAME, VERSION], [
diff --git a/test/data/ua/browser/browser-all.json b/test/data/ua/browser/browser-all.json
index 3fc0e5e..8f80b25 100644
--- a/test/data/ua/browser/browser-all.json
+++ b/test/data/ua/browser/browser-all.json
@@ -2675,5 +2675,27 @@
             "major"   : "10",
             "type"    : "inapp"
         }
+    },
+    {
+        "desc"    : "Zalo on iOS",
+        "ua"      : "Mozilla/5.0 (iPhone; CPU iPhone OS 13_5_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Zalo/20.05.01 Mobile/15E148",
+        "expect"  :
+        {
+            "name"    : "Zalo",
+            "version" : "20.05.01",
+            "major"   : "20",
+            "type"    : "inapp"
+        }
+    },
+    {
+        "desc"    : "Zalo on Android",
+        "ua"      : "Mozilla/5.0 (Linux; Android 10; Vsmart Live Build/QKQ1.190918.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.108 Mobile Safari/537.36 Zalo/20.04.02.r1",
+        "expect"  :
+        {
+            "name"    : "Zalo",
+            "version" : "20.04.02.r1",
+            "major"   : "20",
+            "type"    : "inapp"
+        }
     }
 ]
\ No newline at end of file