diff --git a/src/web/js/maestro_availabel_date.js b/src/web/js/maestro_available_date.js
similarity index 100%
rename from src/web/js/maestro_availabel_date.js
rename to src/web/js/maestro_available_date.js
diff --git a/src/web/maestro/extension.html b/src/web/maestro/extension.html
index 1d05546..b0bfbd5 100644
--- a/src/web/maestro/extension.html
+++ b/src/web/maestro/extension.html
@@ -46,7 +46,7 @@
 	<script type="text/javascript" src="./../js/lib/maestro_info.js"></script>
 	<script type="text/javascript" src="./../js/request_server.js"></script>
 	<script type="text/javascript" src="./../js/maestro_main.js"></script>
-	<script type="text/javascript" src="./../js/maestro_availabel_date.js"></script>
+	<script type="text/javascript" src="./../js/maestro_available_date.js"></script>
 	<script type="text/javascript" src="./../js/player_list.js"></script>
 	<script type="text/javascript" src="./../js/player_list_navigator.js"></script>
 	<script type="text/javascript" src="./../js/player_list_manager.js"></script>
diff --git a/src/web/maestro/main_menu.html b/src/web/maestro/main_menu.html
index 2c95e0a..4da50e9 100644
--- a/src/web/maestro/main_menu.html
+++ b/src/web/maestro/main_menu.html
@@ -38,7 +38,7 @@
 	<script type="text/javascript" src="./../js/lib/maestro_info.js"></script>
 	<script type="text/javascript" src="./../js/request_server.js"></script>
 	<script type="text/javascript" src="./../js/maestro_main.js"></script>
-	<script type="text/javascript" src="./../js/maestro_availabel_date.js"></script>
+	<script type="text/javascript" src="./../js/maestro_available_date.js"></script>
 	<script type="text/javascript" src="./../js/player_list.js"></script>
 	<script type="text/javascript" src="./../js/player_list_navigator.js"></script>
 	<script type="text/javascript" src="./../js/player_list_manager.js"></script>
diff --git a/src/web/maestro/setup.html b/src/web/maestro/setup.html
index 08a75d5..3148cc8 100644
--- a/src/web/maestro/setup.html
+++ b/src/web/maestro/setup.html
@@ -45,7 +45,7 @@
 	<script type="text/javascript" src="./../js/lib/maestro_info.js"></script>
 	<script type="text/javascript" src="./../js/request_server.js"></script>
 	<script type="text/javascript" src="./../js/maestro_main.js"></script>
-	<script type="text/javascript" src="./../js/maestro_availabel_date.js"></script>
+	<script type="text/javascript" src="./../js/maestro_available_date.js"></script>
 	<script type="text/javascript" src="./../js/player_list.js"></script>
 	<script type="text/javascript" src="./../js/player_list_navigator.js"></script>
 	<script type="text/javascript" src="./../js/player_list_manager.js"></script>
diff --git a/src/web/maestro/upgrade.html b/src/web/maestro/upgrade.html
index ec10d9d..b02617f 100644
--- a/src/web/maestro/upgrade.html
+++ b/src/web/maestro/upgrade.html
@@ -45,7 +45,7 @@
 	<script type="text/javascript" src="./../js/lib/maestro_info.js"></script>
 	<script type="text/javascript" src="./../js/request_server.js"></script>
 	<script type="text/javascript" src="./../js/maestro_main.js"></script>
-	<script type="text/javascript" src="./../js/maestro_availabel_date.js"></script>
+	<script type="text/javascript" src="./../js/maestro_available_date.js"></script>
 	<script type="text/javascript" src="./../js/player_list.js"></script>
 	<script type="text/javascript" src="./../js/player_list_navigator.js"></script>
 	<script type="text/javascript" src="./../js/player_list_manager.js"></script>
diff --git a/src/web/module/maestro_extension.html b/src/web/module/maestro_extension.html
index 43e6db2..76c8a79 100644
--- a/src/web/module/maestro_extension.html
+++ b/src/web/module/maestro_extension.html
@@ -99,7 +99,7 @@ function extendMaestroAccount() {
 			<div class="input-group my-auto">
 				<input type="text" id="maestro_info_player_count" class="form-control px-2 mx-0" value="학생수 :">
 				<div class="input-group-append">
-					<a class="btn btn-primary px-2 mr-2 disabled" role="button" href="./../maestro/upgrade.html">업그레이드</a>
+					<a class="btn btn-primary px-2 mr-2" role="button" href="./../maestro/upgrade.html">업그레이드</a>
 				</div>
 			</div>