diff --git a/README.md b/README.md
index 5371fc7..7931b88 100644
--- a/README.md
+++ b/README.md
@@ -12,8 +12,18 @@
 - `command`: Command to get seed in console
 - `parser`: Parser for the command result
 
+Default config file:
+```
+{
+    'command': 'seed',
+    'parser': 'Seed: [{}]'
+}
+```
+
 The default configuration already supports most server software (without plugin/mods).
 
-## More
+## Thanks to
+
+This plugin was inspired by [`MCDReforged/Seed`](https://github.com/MCDReforged/Seed)
 
-This plugn was inspired by [`MCDReforged/Seed`](https://github.com/MCDReforged/Seed)
+Thanks to @[alex3236](https://github.com/alex3236) for refactoring the code（（
diff --git a/mcdreforged.plugin.json b/mcdreforged.plugin.json
index 35258a9..50b08ea 100644
--- a/mcdreforged.plugin.json
+++ b/mcdreforged.plugin.json
@@ -4,7 +4,7 @@
     "name": "Seed",
     "description": "Get world seed without op permission.",
     "author": [
-        "OptiJava"
+      "OptiJava"
     ],
     "link": "https://github.com/OptiJava/Seed",
     "dependencies": {
diff --git a/seed/__init__.py b/seed/__init__.py
index 8f6ec4b..11eb97e 100644
--- a/seed/__init__.py
+++ b/seed/__init__.py
@@ -46,7 +46,7 @@ def get_seed(server: PluginServerInterface):
     getting_seed = False
 
 
-def on_info(server: ServerInterface, info: Info):
+def on_info(server: PluginServerInterface, info: Info):
     global getting_seed, seed
     if getting_seed:
         result = parse(config['parser'], info.content)
@@ -61,7 +61,7 @@ def print_seed(source: CommandSource):
         RTextMCDRTranslation('seed.get_seed', RColor.yellow),
         RText('[', RColor.white),
         RText(seed, RColor.green, RStyle.underlined).
-            h(RTextMCDRTranslation('seed.copy_to_clipboard')).
-            c(RAction.copy_to_clipboard, seed),
+        h(RTextMCDRTranslation('seed.copy_to_clipboard')).
+        c(RAction.copy_to_clipboard, seed),
         RText(']', RColor.white))
     )