diff --git a/config/lib.json b/config/lib.json
index bfe6ec6c..18f71244 100644
--- a/config/lib.json
+++ b/config/lib.json
@@ -96,6 +96,15 @@
             "gmp.h"
         ]
     },
+    "icu": {
+        "source": "icu",
+        "static-libs-unix": [
+            "libicui18n.a",
+            "libicuio.a",
+            "libicuuc.a",
+            "libicudata.a"
+        ]
+    },
     "imagemagick": {
         "source": "imagemagick",
         "static-libs-unix": [
@@ -200,6 +209,12 @@
             "zlib"
         ]
     },
+    "libsodium": {
+        "source": "libsodium",
+        "static-libs-unix": [
+            "libsodium.a"
+        ]
+    },
     "libssh2": {
         "source": "libssh2",
         "static-libs-unix": [
@@ -454,11 +469,5 @@
             "zstd.h",
             "zstd_errors.h"
         ]
-    },
-    "libsodium": {
-        "source": "libsodium",
-        "static-libs-unix": [
-            "libsodium.a"
-        ]
     }
 }
\ No newline at end of file
diff --git a/config/source.json b/config/source.json
index d74fd496..a5ede620 100644
--- a/config/source.json
+++ b/config/source.json
@@ -99,6 +99,14 @@
             "text": "Since version 6, GMP is distributed under the dual licenses, GNU LGPL v3 and GNU GPL v2. These licenses make the library free to use, share, and improve, and allow you to pass on the result. The GNU licenses give freedoms, but also set firm restrictions on the use with non-free programs."
         }
     },
+    "icu": {
+        "type": "url",
+        "url": "https://github.com/unicode-org/icu/releases/download/release-73-1/icu4c-73_1-src.tgz",
+        "license": {
+            "type": "file",
+            "path": "LICENSE"
+        }
+    },
     "imagemagick": {
         "type": "ghtar",
         "repo": "ImageMagick/ImageMagick",
@@ -186,6 +194,14 @@
             "path": "COPYING"
         }
     },
+    "libsodium": {
+        "type": "url",
+        "url": "https://download.libsodium.org/libsodium/releases/libsodium-1.0.18.tar.gz",
+        "license": {
+            "type": "file",
+            "path": "LICENSE"
+        }
+    },
     "libssh2": {
         "type": "ghrel",
         "repo": "libssh2/libssh2",
@@ -411,13 +427,5 @@
             "type": "file",
             "path": "LICENSE"
         }
-    },
-    "libsodium": {
-        "type": "url",
-        "url": "https://download.libsodium.org/libsodium/releases/libsodium-1.0.18.tar.gz",
-        "license": {
-            "type": "file",
-            "path": "LICENSE"
-        }
     }
 }
\ No newline at end of file
diff --git a/src/SPC/builder/linux/LinuxBuilder.php b/src/SPC/builder/linux/LinuxBuilder.php
index b8d8757d..8aee51ce 100644
--- a/src/SPC/builder/linux/LinuxBuilder.php
+++ b/src/SPC/builder/linux/LinuxBuilder.php
@@ -139,7 +139,7 @@ class LinuxBuilder extends BuilderBase
                 )
             );
         }
-        if ($this->getExt('swoole')) {
+        if ($this->getExt('swoole') || $this->getExt('intl')) {
             $extra_libs .= ' -lstdc++';
         }
         if ($this->getExt('imagick')) {
diff --git a/src/SPC/builder/linux/library/icu.php b/src/SPC/builder/linux/library/icu.php
new file mode 100644
index 00000000..c6ef6c37
--- /dev/null
+++ b/src/SPC/builder/linux/library/icu.php
@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\builder\linux\library;
+
+class icu extends LinuxLibraryBase
+{
+    public const NAME = 'icu';
+
+    protected function build()
+    {
+        $root = BUILD_ROOT_PATH;
+        $cppflag = 'CPPFLAGS="-DU_CHARSET_IS_UTF8=1  -DU_USING_ICU_NAMESPACE=1  -DU_STATIC_IMPLEMENTATION=1"';
+        shell()->cd($this->source_dir . '/source')
+            ->exec(
+                "{$this->builder->configure_env} {$cppflag} ./runConfigureICU Linux " .
+                '--enable-static ' .
+                '--disable-shared ' .
+                '--with-data-packaging=static ' .
+                '--enable-release=yes ' .
+                '--enable-extras=yes ' .
+                '--enable-icuio=yes ' .
+                '--enable-dyload=no ' .
+                '--enable-tools=yes ' .
+                '--enable-tests=no ' .
+                '--enable-samples=no ' .
+                "--prefix={$root}"
+            )
+            ->exec('make clean')
+            ->exec("make -j{$this->builder->concurrency}")
+            ->exec('make install');
+    }
+}
diff --git a/src/SPC/builder/macos/MacOSBuilder.php b/src/SPC/builder/macos/MacOSBuilder.php
index cb7f9f56..65b1a7f6 100644
--- a/src/SPC/builder/macos/MacOSBuilder.php
+++ b/src/SPC/builder/macos/MacOSBuilder.php
@@ -123,7 +123,7 @@ class MacOSBuilder extends BuilderBase
      */
     public function buildPHP(int $build_target = BUILD_TARGET_NONE, bool $bloat = false): void
     {
-        $extra_libs = $this->getFrameworks(true) . ' ' . ($this->getExt('swoole') ? '-lc++ ' : '');
+        $extra_libs = $this->getFrameworks(true) . ' ' . ($this->getExt('swoole') || $this->getExt('intl') ? '-lc++ ' : '');
         if (!$bloat) {
             $extra_libs .= implode(' ', $this->getAllStaticLibFiles());
         } else {
diff --git a/src/SPC/builder/macos/library/icu.php b/src/SPC/builder/macos/library/icu.php
new file mode 100644
index 00000000..dd7967a1
--- /dev/null
+++ b/src/SPC/builder/macos/library/icu.php
@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\builder\macos\library;
+
+class icu extends MacOSLibraryBase
+{
+    public const NAME = 'icu';
+
+    protected function build()
+    {
+        $root = BUILD_ROOT_PATH;
+        shell()->cd($this->source_dir . '/source')
+            ->exec("{$this->builder->configure_env} ./runConfigureICU MacOSX --enable-static --disable-shared --prefix={$root}")
+            ->exec('make clean')
+            ->exec("make -j{$this->builder->concurrency}")
+            ->exec('make install');
+    }
+}
diff --git a/src/globals/tests/intl.php b/src/globals/tests/intl.php
new file mode 100644
index 00000000..32ccd568
--- /dev/null
+++ b/src/globals/tests/intl.php
@@ -0,0 +1,5 @@
+<?php
+
+declare(strict_types=1);
+
+assert(class_exists(NumberFormatter::class));