diff --git a/config/ext.json b/config/ext.json
index b8040236..05ef27ee 100644
--- a/config/ext.json
+++ b/config/ext.json
@@ -360,6 +360,15 @@
             "zlib"
         ]
     },
+    "msgpack": {
+        "support": {
+            "BSD": "wip"
+        },
+        "type": "external",
+        "source": "msgpack",
+        "arg-type-unix": "with",
+        "arg-type-win": "enable"
+    },
     "mysqli": {
         "type": "builtin",
         "arg-type": "with",
diff --git a/config/source.json b/config/source.json
index e92a7daf..5e342585 100644
--- a/config/source.json
+++ b/config/source.json
@@ -514,6 +514,16 @@
             "path": "LICENSE"
         }
     },
+    "msgpack": {
+        "type": "url",
+        "url": "https://pecl.php.net/get/msgpack",
+        "path": "php-src/ext/msgpack",
+        "filename": "msgpack.tgz",
+        "license": {
+            "type": "file",
+            "path": "LICENSE"
+        }
+    },
     "ncurses": {
         "type": "filelist",
         "url": "https://ftp.gnu.org/pub/gnu/ncurses/",
diff --git a/src/globals/ext-tests/msgpack.php b/src/globals/ext-tests/msgpack.php
new file mode 100644
index 00000000..2c6973fa
--- /dev/null
+++ b/src/globals/ext-tests/msgpack.php
@@ -0,0 +1,7 @@
+<?php
+
+declare(strict_types=1);
+
+assert(function_exists('msgpack_pack'));
+assert(function_exists('msgpack_unpack'));
+assert(msgpack_unpack(msgpack_pack(['foo', 'bar'])) === ['foo', 'bar']);
diff --git a/src/globals/test-extensions.php b/src/globals/test-extensions.php
index cb537a11..8bef39de 100644
--- a/src/globals/test-extensions.php
+++ b/src/globals/test-extensions.php
@@ -19,8 +19,8 @@ $upx = true;
 
 // If you want to test your added extensions and libs, add below (comma separated, example `bcmath,openssl`).
 $extensions = match (PHP_OS_FAMILY) {
-    'Linux', 'Darwin' => 'redis,igbinary',
-    'Windows' => 'redis,igbinary',
+    'Linux', 'Darwin' => 'redis,igbinary,msgpack',
+    'Windows' => 'redis,igbinary,msgpack',
 };
 
 // If you want to test lib-suggests feature with extension, add them below (comma separated, example `libwebp,libavif`).