diff --git a/CMakeLists.txt b/CMakeLists.txt
index 406889daf42..5baca1d2ba7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
 PROJECT(libswoole)
 
 ENABLE_LANGUAGE(ASM)
-set(SWOOLE_VERSION 4.8.1)
+set(SWOOLE_VERSION 4.8.2-dev)
 
 set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -Wall -g")
diff --git a/include/swoole_version.h b/include/swoole_version.h
index 79f4ba08a78..312111a439a 100644
--- a/include/swoole_version.h
+++ b/include/swoole_version.h
@@ -20,10 +20,10 @@
 
 #define SWOOLE_MAJOR_VERSION 4
 #define SWOOLE_MINOR_VERSION 8
-#define SWOOLE_RELEASE_VERSION 1
-#define SWOOLE_EXTRA_VERSION ""
-#define SWOOLE_VERSION "4.8.1"
-#define SWOOLE_VERSION_ID 40801
+#define SWOOLE_RELEASE_VERSION 2
+#define SWOOLE_EXTRA_VERSION "dev"
+#define SWOOLE_VERSION "4.8.2-dev"
+#define SWOOLE_VERSION_ID 40802
 #define SWOOLE_API_VERSION_ID 0x202109a
 
 #define SWOOLE_BUG_REPORT                                                                                              \
diff --git a/tools/next-version.php b/tools/next-version.php
index 7e13f76e548..ae4f76962ac 100755
--- a/tools/next-version.php
+++ b/tools/next-version.php
@@ -7,11 +7,13 @@ class Version
     public $minor;
     public $release;
     public $extra;
+    public $api;
 
     const REGX_MAJOR = '#define\s+SWOOLE_MAJOR_VERSION\s+(\d+)#';
     const REGX_MINOR = '#define\s+SWOOLE_MINOR_VERSION\s+(\d+)#';
     const REGX_RELEASE = '#define\s+SWOOLE_RELEASE_VERSION\s+(\d+)#';
     const REGX_EXTRA = '#define\s+SWOOLE_EXTRA_VERSION\s+"(\w*)"#';
+    const REGX_API = '#define\s+SWOOLE_API_VERSION_ID\s+(0x[0-9a-f]*)#';
 
     function getVersion()
     {
@@ -26,6 +28,21 @@ function getVersionId()
     {
         return intval(sprintf('%d%02d%02d', $this->major, $this->minor, $this->release));
     }
+
+    function match($versionInfo) {
+        preg_match(Version::REGX_MAJOR, $versionInfo, $match_major) or die('no match MAJOR_VERSION');
+        preg_match(Version::REGX_MINOR, $versionInfo, $match_minor) or die('no match MAJOR_MINOR');;
+        preg_match(Version::REGX_RELEASE, $versionInfo,
+            $match_release) or die('no match RELEASE_VERSION');;
+        preg_match(Version::REGX_EXTRA, $versionInfo, $match_extra) or die('no match EXTRA_VERSION');
+        preg_match(Version::REGX_API, $versionInfo, $match_api) or die('no match API_VERSION_ID');
+
+        $this->major = intval($match_major[1]);
+        $this->minor = intval($match_minor[1]);
+        $this->release = intval($match_release[1]);
+        $this->extra = trim($match_extra[1]);
+        $this->api = trim($match_api[1]);
+    }
 }
 
 $type = empty($argv[1]) ? 'release' : trim($argv[1]);
@@ -33,19 +50,8 @@ function getVersionId()
 $cmake_file = dirname(__DIR__) . '/CMakeLists.txt';
 $package_file = dirname(__DIR__) . '/package.xml';
 
-$versionInfo = file_get_contents($kernel_version_file);
-
-preg_match(Version::REGX_MAJOR, $versionInfo, $match_major) or die('no match MAJOR_VERSION');
-preg_match(Version::REGX_MINOR, $versionInfo, $match_minor) or die('no match MAJOR_MINOR');;
-preg_match(Version::REGX_RELEASE, $versionInfo,
-    $match_release) or die('no match RELEASE_VERSION');;
-preg_match(Version::REGX_EXTRA, $versionInfo, $match_extra) or die('no match EXTRA_VERSION');
-
 $current = new Version;
-$current->major = intval($match_major[1]);
-$current->minor = intval($match_minor[1]);
-$current->release = intval($match_release[1]);
-$current->extra = trim($match_extra[1]);
+$current->match(file_get_contents($kernel_version_file));
 
 $next = clone $current;
 
@@ -65,17 +71,24 @@ function getVersionId()
     $next->minor = 0;
     $next->release = 0;
     $next->extra = 'dev';
+} elseif ($type == 'api') {
+    $date = substr($current->api, 2, strlen($current->api) - 3);
+    if ($date == date('Ym')) {
+        $c = substr($current->api, -1, 1);
+        if ($c == 'f') {
+            throw new RuntimeException("maximum exceeded[$current->api]");
+        }
+        $next->api = '0x' . $date . chr(ord($c) + 1);
+    } else {
+        $next->api = '0x' . date('Ym') . 'a';
+    }
 } else {
     exit("wrong version type");
 }
 
 if (empty($next->extra)) {
-    $doc = new DOMDocument();
-    $doc->load($package_file);
-    $versions = $doc->getElementsByTagName("version");
-    $versions[0]->getElementsByTagName('release')->item(0)->nodeValue = $next->getVersion();
-    $versions[0]->getElementsByTagName('api')->item(0)->nodeValue = $next->major . '.0';
-    $doc->save($package_file);
+    $doc = file_get_contents($package_file);
+    file_put_contents($package_file, str_replace($current->getVersion(), $next->getVersion(), $doc));
 }
 
 ob_start();
diff --git a/tools/templates/version.tpl.h b/tools/templates/version.tpl.h
index 3487d27b23e..32affab28a4 100644
--- a/tools/templates/version.tpl.h
+++ b/tools/templates/version.tpl.h
@@ -24,7 +24,7 @@
 #define SWOOLE_EXTRA_VERSION "<?=$next->extra ?>"
 #define SWOOLE_VERSION "<?=$next->getVersion() ?>"
 #define SWOOLE_VERSION_ID <?=$next->getVersionId()."\n" ?>
-#define SWOOLE_API_VERSION_ID 0x202012a
+#define SWOOLE_API_VERSION_ID <?=$next->api."\n" ?>
 
 #define SWOOLE_BUG_REPORT                                                                                              \
     "A bug occurred in Swoole-v" SWOOLE_VERSION ", please report it.\n"                                                \