diff --git a/src/Changelog/ChangeLogUtil.php b/src/Changelog/ChangeLogUtil.php
index cac4c7a..17307d2 100644
--- a/src/Changelog/ChangeLogUtil.php
+++ b/src/Changelog/ChangeLogUtil.php
@@ -15,16 +15,29 @@ class ChangeLogUtil
 {
     /**
      * @param string $msg
+     * @param array{startWiths: list<string>, contains: list<string>} $rule
      *
      * @return bool
      */
-    public static function isFixMsg(string $msg): bool
+    public static function matchMsgByRule(string $msg, array $rule): bool
     {
-        if (stripos($msg, 'bug') === 0 || stripos($msg, 'close') === 0 || stripos($msg, 'fix') === 0) {
-            return true;
+        if (isset($rule['startWiths'])) {
+            foreach ($rule['startWiths'] as $start) {
+                if (stripos($msg, $start) === 0) {
+                    return true;
+                }
+            }
         }
 
-        return stripos($msg, ' fix') > 0;
+        if (isset($rule['contains'])) {
+            foreach ($rule['contains'] as $sub) {
+                if (stripos($msg, $sub) > 0) {
+                    return true;
+                }
+            }
+        }
+
+        return false;
     }
 
     /**
@@ -38,5 +51,4 @@ public static function mkdir(string $path, int $mode = 0775, bool $recursive = t
     {
         return (is_dir($path) || !(!@mkdir($path, $mode, $recursive) && !is_dir($path))) && is_writable($path);
     }
-
 }
diff --git a/src/Changelog/Formatter/AbstractFormatter.php b/src/Changelog/Formatter/AbstractFormatter.php
index 8a09ea2..6e3e690 100644
--- a/src/Changelog/Formatter/AbstractFormatter.php
+++ b/src/Changelog/Formatter/AbstractFormatter.php
@@ -5,7 +5,7 @@
 use PhpGit\Changelog\ChangeLogUtil;
 use PhpGit\Changelog\GitChangeLog;
 use PhpGit\Changelog\ItemFormatterInterface;
-use function stripos;
+use function array_merge;
 
 /**
  * Class AbstractFormatter
@@ -15,22 +15,60 @@
 abstract class AbstractFormatter implements ItemFormatterInterface
 {
     /**
-     * @param string $msg
+     * The group name match rules. key is the group name.
      *
-     * @return string
+     * @var array<string, array<string, string[]>>
+     * @see defaultRules()
      */
-    public function matchGroup(string $msg): string
+    protected array $rules = [];
+
+    /**
+     * Class constructor.
+     *
+     * @param array $rules
+     */
+    public function __construct(array $rules = [])
     {
-        if (ChangeLogUtil::isFixMsg($msg)) {
-            return 'Fixed';
+        if ($rules) {
+            $this->rules = array_merge(self::defaultRules(), $rules);
+        } else {
+            $this->rules = self::defaultRules();
         }
+    }
 
-        if (stripos($msg, 'up') === 0 || stripos($msg, 'add') === 0 || stripos($msg, 'create') === 0) {
-            return 'Update';
-        }
+    public static function defaultRules(): array
+    {
+        return [
+            'Refactor' => [
+                'startWiths' => ['break', 'refactor'],
+                'contains'   => [],
+            ],
+            'Update'   => [
+                'startWiths' => ['up', 'add', 'create', 'prof', 'perf', 'enhance'],
+                'contains'   => [],
+            ],
+            'Feature'  => [
+                'startWiths' => ['feat', 'support', 'new'],
+                'contains'   => [],
+            ],
+            'Fixed'    => [
+                'startWiths' => ['bug', 'fix', 'close'],
+                'contains'   => [' fix']
+            ]
+        ];
+    }
 
-        if (stripos($msg, 'feat') === 0 || stripos($msg, 'support') === 0 || stripos($msg, 'new') === 0) {
-            return 'Feature';
+    /**
+     * @param string $msg
+     *
+     * @return string
+     */
+    public function matchGroup(string $msg): string
+    {
+        foreach ($this->rules as $group => $rule) {
+            if (ChangeLogUtil::matchMsgByRule($msg, $rule)) {
+                return $group;
+            }
         }
 
         return GitChangeLog::OTHER_GROUP;
@@ -42,4 +80,20 @@ public function matchGroup(string $msg): string
      * @return string[] returns [group, line string]
      */
     abstract public function format(array $item): array;
+
+    /**
+     * @return array[]
+     */
+    public function getRules(): array
+    {
+        return $this->rules;
+    }
+
+    /**
+     * @param array[] $rules
+     */
+    public function setRules(array $rules): void
+    {
+        $this->rules = $rules;
+    }
 }