diff --git a/src/main/resources/Group.hbm.xml b/src/main/resources/Group.hbm.xml
index 47bb391..cc7105d 100644
--- a/src/main/resources/Group.hbm.xml
+++ b/src/main/resources/Group.hbm.xml
@@ -21,9 +21,17 @@
             <key column = "GID" not-null="false"/>
             <one-to-many class="Request"/>
         </set>
-        <set name = "members" cascade = "all" table = "USER_GROUP">
-            <key column = "GID"/>
-            <one-to-many class = "User"/>
+        <set name = "members"
+             table = "USER_GROUP"
+             lazy = "true"
+             inverse = "true"
+             cascade = "all">
+            <key column="GID"/>
+            <many-to-many
+                    class="User"
+                    column="UID"
+                    outer-join="auto">
+            </many-to-many>
         </set>
     </class>