diff --git a/app/src/main/java/com/example/cosmosclient/views/GroupListActivity.java b/app/src/main/java/com/example/cosmosclient/views/GroupListActivity.java
index 9c9374c..08b6688 100644
--- a/app/src/main/java/com/example/cosmosclient/views/GroupListActivity.java
+++ b/app/src/main/java/com/example/cosmosclient/views/GroupListActivity.java
@@ -222,7 +222,7 @@
 
         //retrofitの処理
         final Retrofit retrofit = new Retrofit.Builder()
-                .baseUrl("http://nitta-lab-www.is.konan-u.ac.jp/cosmos/")
+                .baseUrl("http://nitta-lab-www.is.konan-u.ac.jp/cosmos/rest/")
                 .addConverterFactory(JacksonConverterFactory.create())
                 .build();
         //interfaceから実装を取得