diff --git a/src/recipe/lang/Dart/Flutter.c b/src/recipe/lang/Dart/Flutter.c
index 1aa8023c..52f7c1db 100644
--- a/src/recipe/lang/Dart/Flutter.c
+++ b/src/recipe/lang/Dart/Flutter.c
@@ -3,12 +3,14 @@
  * -------------------------------------------------------------
  * File Authors   : Aoran Zeng <ccmywish@qq.com>
  * Contributors   :  Nil Null  <nil@null.org>
+ *                | czyt <czyt.go@gmail.com>
  * Created On     : <2023-09-10>
- * Major Revision :      2
- * Last Modified  : <2024-09-14>
+ * Major Revision :      3
+ * Last Modified  : <2024-10-31>
  *
  * 2024-09-14: 不得不将Dart和Flutter拆分为两个Target，
  *             因为3家教育网镜像站给出的 Dart 和 Flutter 换源URL模式都不一样
+ * 2024-10-31: 补充FLUTTER_STORAGE_BASE_URL的默认源地址
  * ------------------------------------------------------------*/
 
 /**
@@ -16,7 +18,7 @@
  */
 static SourceInfo
 pl_dart_flutter_sources[] = {
-  {&Upstream,       NULL},
+  {&Upstream,      "https://storage.googleapis.com"},
   {&Sjtug_Zhiyuan, "https://mirror.sjtu.edu.cn"}, // 没有后缀，怀疑是否存在问题
   {&Tuna,          "https://mirrors.tuna.tsinghua.edu.cn/git/flutter"}, // URL 带 git
   {&Nju,           "https://mirror.nju.edu.cn/flutter"}
diff --git a/src/recipe/lang/Dart/Pub.c b/src/recipe/lang/Dart/Pub.c
index eca1015f..0bea032a 100644
--- a/src/recipe/lang/Dart/Pub.c
+++ b/src/recipe/lang/Dart/Pub.c
@@ -3,9 +3,12 @@
  * -------------------------------------------------------------
  * File Authors   : Aoran Zeng <ccmywish@qq.com>
  * Contributors   :  Nil Null  <nil@null.org>
+ *                | czyt <czyt.go@gmail.com>
  * Created On     : <2023-09-10>
- * Major Revision :      3
- * Last Modified  : <2024-09-14>
+ * Major Revision :      4
+ * Last Modified  : <2024-10-31>
+ *
+ *  2024-10-31: 补充PUB_HOSTED_URL的默认源地址
  *
  * Dart Pub 软件仓库
  * ------------------------------------------------------------*/
@@ -15,7 +18,7 @@
  */
 static SourceInfo
 pl_dart_sources[] = {
-  {&Upstream,       NULL},
+  {&Upstream,      "https://pub.dev"},
   {&Sjtug_Zhiyuan, "https://mirror.sjtu.edu.cn/dart-pub"},
   {&Tuna,          "https://mirrors.tuna.tsinghua.edu.cn/dart-pub"},
   {&Nju,           "https://mirror.nju.edu.cn/dart-pub"}
diff --git a/src/recipe/lang/Go.c b/src/recipe/lang/Go.c
index 66ecac95..44059574 100644
--- a/src/recipe/lang/Go.c
+++ b/src/recipe/lang/Go.c
@@ -3,8 +3,12 @@
  * -------------------------------------------------------------
  * File Authors  : Aoran Zeng <ccmywish@qq.com>
  * Contributors  :  Nil Null  <nil@null.org>
+ *                | czyt <czyt.go@gmail.com>
  * Created On    : <2023-08-30>
- * Last Modified : <2024-08-09>
+ * Major Revision :      1
+ * Last Modified : <2024-10-31>
+ *
+ *  2024-10-31: 补充Go语言的默认GOPROXY地址
  * ------------------------------------------------------------*/
 
 static MirrorSite
@@ -21,7 +25,7 @@ GoProxyIO = {"goproxy.io",   "GOPROXY.IO",   "GOPROXY.IO",         "https://gopr
  */
 static SourceInfo
 pl_go_sources[] = {
-  {&Upstream,       NULL},
+  {&Upstream,      "https://proxy.golang.org,direct"},
   {&GoProxyCN,     "https://goproxy.cn"},
   {&Ali,           "https://mirrors.aliyun.com/goproxy/"},
   {&Huawei,        "https://mirrors.huaweicloud.com/goproxy/"},