diff --git a/lib/src/connector/course_connector.dart b/lib/src/connector/course_connector.dart
index a063621f..14d89776 100644
--- a/lib/src/connector/course_connector.dart
+++ b/lib/src/connector/course_connector.dart
@@ -55,7 +55,7 @@ class CourseConnector {
         String value = node.attributes['value'];
         data[name] = value;
       }
-      String jumpUrl = "https://app.ntut.edu.tw/${tagNode.getElementsByTagName("form")[0].attributes["action"]}";
+      String jumpUrl = "${NTUTConnector.host}${tagNode.getElementsByTagName("form")[0].attributes["action"]}";
       parameter = ConnectorParameter(jumpUrl);
       parameter.data = data;
       final response = await Connector.getDataByPostResponse(parameter);
diff --git a/lib/src/connector/ntut_connector.dart b/lib/src/connector/ntut_connector.dart
index 69cdb6e1..19cb8426 100644
--- a/lib/src/connector/ntut_connector.dart
+++ b/lib/src/connector/ntut_connector.dart
@@ -26,7 +26,7 @@ enum NTUTConnectorStatus {
 }
 
 class NTUTConnector {
-  static const host = "https://app.ntut.edu.tw/";
+  static const host = "https://nportal.ntut.edu.tw/";
   static const _getPictureUrl = "${host}photoView.do";
   static const _getTreeUrl = "${host}aptreeList.do";
   static const _getCalendarUrl = "${host}calModeApp.do";
diff --git a/pubspec.yaml b/pubspec.yaml
index 69380169..43d6cdef 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -20,7 +20,7 @@ dependencies:
   tat_core:
     git:
       url: git@github.com:NTUT-NPC/TAT-Core.git
-      ref: e5a9259946f1139fa61a784916192915831fe2c5 # restricted by dart language version. (<3)
+      ref: 7611fe96ff2bb7bb5341c742d94f869d86d33e1c # restricted by dart language version. (<3)
 
   path: ^1.8.2 # restricted by flutter sdk.
   path_provider: ^2.0.15