diff --git a/README.md b/README.md
index cd382a2b..249a17da 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ TDLib (Telegram Database library) is a cross-platform library for building [Tele
 
 `TDLib` has many advantages. Notably `TDLib` is:
 
-* **Cross-platform**: `TDLib` can be used on Android, iOS, Windows, macOS, Linux, FreeBSD, OpenBSD, Windows Phone, WebAssembly, watchOS, tvOS, Tizen, Cygwin. It should also work on other *nix systems with or without minimal effort.
+* **Cross-platform**: `TDLib` can be used on Android, iOS, Windows, macOS, Linux, FreeBSD, OpenBSD, NetBSD, Windows Phone, WebAssembly, watchOS, tvOS, Tizen, Cygwin. It should also work on other *nix systems with or without minimal effort.
 * **Multilanguage**: `TDLib` can be easily used with any programming language that is able to execute C functions. Additionally it already has native Java (using `JNI`) bindings and .NET (using `C++/CLI` and `C++/CX`) bindings.
 * **Easy to use**: `TDLib` takes care of all network implementation details, encryption and local data storage.
 * **High-performance**: in the [Telegram Bot API](https://core.telegram.org/bots/api), each `TDLib` instance handles more than 24000 active bots simultaneously.
diff --git a/build.html b/build.html
index 2bca99d4..c7fe612a 100644
--- a/build.html
+++ b/build.html
@@ -163,7 +163,7 @@ function getSupportedOs(language) {
     case 'Choose a programming language:':
       return [];
     case 'JavaScript':
-      return ['Windows (Node.js)', 'Linux (Node.js)', 'macOS (Node.js)', 'FreeBSD (Node.js)', 'OpenBSD (Node.js)', 'Browser'];
+      return ['Windows (Node.js)', 'Linux (Node.js)', 'macOS (Node.js)', 'FreeBSD (Node.js)', 'OpenBSD (Node.js)', 'NetBSD (Node.js)', 'Browser'];
     case 'Java':
       return ['Windows', 'Linux', 'macOS', 'FreeBSD', 'OpenBSD', 'Android'];
     case 'C#':
@@ -172,7 +172,7 @@ function getSupportedOs(language) {
     case 'Objective-C':
       return ['Windows', 'Linux', 'macOS', 'iOS', 'tvOS', 'watchOS'];
     default:
-      return ['Windows', 'Linux', 'macOS', 'FreeBSD', 'OpenBSD'];
+      return ['Windows', 'Linux', 'macOS', 'FreeBSD', 'OpenBSD', 'NetBSD'];
   }
 }
 
@@ -342,6 +342,7 @@ function onOptionsChanged() {
   var os_mac = os.includes('macOS');
   var os_freebsd = os.includes('FreeBSD');
   var os_openbsd = os.includes('OpenBSD');
+  var os_netbsd = os.includes('NetBSD');
 
   var display_commands = 'block';
   var linux_distro = 'none';
@@ -365,7 +366,7 @@ function onOptionsChanged() {
   }
 
   var low_memory = false;
-  if (os_linux || os_freebsd || os_openbsd) {
+  if (os_linux || os_freebsd || os_openbsd || os_netbsd) {
     low_memory = document.getElementById('buildLowMemoryCheckbox').checked;
     document.getElementById('buildLowMemoryText').innerHTML = 'I have less than ' + (use_clang ? '1.5' : '3.5') +' GB of RAM.' +
             (low_memory ? ' Now you will need only ' + (use_clang ? '0.5' : '1') +' GB of RAM to build TDLib.' : '');
@@ -375,7 +376,7 @@ function onOptionsChanged() {
   }
 
   var use_root = false;
-  if (os_linux && linux_distro !== 'Other') {
+  if ((os_linux && linux_distro !== 'Other') || os_openbsd || os_netbsd) {
     use_root = document.getElementById('buildRootCheckbox').checked;
     document.getElementById('buildRootDiv').style.display = 'block';
   } else {
@@ -432,7 +433,7 @@ function onOptionsChanged() {
   }
 
   var sudo = 'sudo ';
-  if (use_root || linux_distro.includes('Debian') || os_freebsd || os_openbsd) {
+  if (use_root || linux_distro.includes('Debian') || os_freebsd || os_openbsd || os_netbsd) {
     sudo = '';
   }
 
@@ -508,6 +509,9 @@ function onOptionsChanged() {
   if (os_openbsd) {
     pre_text.push('Note that following instruction is for OpenBSD 6.4 and default KSH shell.');
   }
+  if (os_netbsd) {
+    pre_text.push('Note that following instruction is for NetBSD 8.0 and default SH shell.');
+  }
 
   var terminal_name = (function () {
     if (os_windows) {
@@ -519,6 +523,9 @@ function onOptionsChanged() {
     if (os_openbsd) {
       return 'ksh';
     }
+    if (os_netbsd) {
+      return 'sh';
+    }
     if (use_csh) {
       return 'tcsh/csh';
     }
@@ -639,6 +646,16 @@ function onOptionsChanged() {
     }
 
     php = "php-7.2";
+  } else if (os_netbsd) {
+    if (!use_root) {
+      commands.push('su -');
+    }
+    commands.push('export PKG_PATH=ftp://ftp.netbsd.org/pub/pkgsrc/packages/NetBSD/i386/8.0_2019Q2/All');
+    var packages = 'git gperf php-7.3.6 cmake openssl gcc5-libs';
+    commands.push('pkg_add ' + packages);
+    if (!use_root) {
+      commands.push('exit');
+    }
   }
   commands.push('git clone https://github.com/tdlib/td.git');
 
@@ -812,7 +829,7 @@ function onOptionsChanged() {
       if (os_freebsd) {
         cmake_init_options.push('-DJAVA_HOME=/usr/local/openjdk7/');
       }
-      var resolve_path = use_powershell ? 'Resolve-Path' : (os_mac ? 'greadlink -e' : (is_alpine || os_freebsd || os_openbsd ? 'readlink -f' : 'readlink -e'));
+      var resolve_path = use_powershell ? 'Resolve-Path' : (os_mac ? 'greadlink -e' : (is_alpine || os_freebsd || os_openbsd || os_netbsd ? 'readlink -f' : 'readlink -e'));
       var resolved_path = resolve_path + ' ../td/lib/cmake/Td';
       if (use_csh) {
         cmake_init_options.push('-DTd_DIR:PATH=$td_dir');