diff --git a/source/ubl-settings-update.c b/source/ubl-settings-update.c
index e31e9bd..a1efdb3 100644
--- a/source/ubl-settings-update.c
+++ b/source/ubl-settings-update.c
@@ -600,6 +600,16 @@ void on_web_publish_add(GtkWidget *,main_window *widgets){
     g_signal_connect(G_OBJECT(window->AcceptButton),"clicked",G_CALLBACK(on_web_publish_accept),dict);
 }
 
+void on_scrolled_window_size_allocate(GtkWidget *, GdkRectangle *allocation, repo_add_window *window){
+    if (allocation->height<100){
+        gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(gtk_widget_get_parent(gtk_widget_get_parent(window->SourceListBox))),GTK_POLICY_NEVER,GTK_POLICY_NEVER);
+        gtk_widget_set_size_request(gtk_widget_get_parent(gtk_widget_get_parent(window->SourceListBox)),-1,allocation->height);
+    } else {
+        gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(gtk_widget_get_parent(gtk_widget_get_parent(window->SourceListBox))),GTK_POLICY_NEVER,GTK_POLICY_ALWAYS);
+        gtk_widget_set_size_request(gtk_widget_get_parent(gtk_widget_get_parent(window->SourceListBox)),-1,100);
+    }
+}
+
 void on_repo_add(GtkWidget *, main_window *widgets){
     gtk_tree_selection_unselect_all(gtk_tree_view_get_selection(GTK_TREE_VIEW(widgets->MirrorTree)));
     repo_add_window *window = yon_repo_add_window_new();
@@ -1359,6 +1369,7 @@ repo_add_window *yon_repo_add_window_new(){
     window->CancelButton = yon_gtk_builder_get_widget(builder,"CancelButton");
     window->HeadLabel = yon_gtk_builder_get_widget(builder,"HeadLabel");
     window->SourceBox = yon_gtk_builder_get_widget(builder,"SourceBox");
+    window->SourceListBox = yon_gtk_builder_get_widget(builder,"SourceListBox");
     window->RepoSourceAddButton = yon_gtk_builder_get_widget(builder,"RepoSourceAddButton");
     window->NeverRadio = yon_gtk_builder_get_widget(builder,"NeverRadio");
     window->OptionalRadio = yon_gtk_builder_get_widget(builder,"OptionalRadio");
@@ -1384,6 +1395,7 @@ repo_add_window *yon_repo_add_window_new(){
     g_signal_connect(G_OBJECT(window->UsageDefaultCheck),"toggled",G_CALLBACK(yon_gtk_widget_set_sensitive_from_toggle_button_inversed),window->UsageEnableSearchCheck);
     g_signal_connect(G_OBJECT(window->UsageDefaultCheck),"toggled",G_CALLBACK(yon_gtk_widget_set_sensitive_from_toggle_button_inversed),window->UsageEnableUpdateCheck);
     g_signal_connect(G_OBJECT(window->UsageDefaultCheck),"toggled",G_CALLBACK(yon_gtk_widget_set_sensitive_from_toggle_button_inversed),window->UsageSysupgradeCheck);
+    g_signal_connect(G_OBJECT(window->SourceListBox),"size-allocate",G_CALLBACK(on_scrolled_window_size_allocate),window);
     gtk_widget_show(window->Window);
     
     return window;
diff --git a/source/ubl-settings-update.h b/source/ubl-settings-update.h
index f2cc8c6..8031568 100644
--- a/source/ubl-settings-update.h
+++ b/source/ubl-settings-update.h
@@ -152,6 +152,7 @@ typedef struct {
     GtkWidget *UsageEnableSearchCheck;
     GtkWidget *UsageEnableUpdateCheck;
     GtkWidget *UsageDefaultCheck;
+    GtkWidget *SourceListBox;
     GtkWidget *RepoSignConditionCombo;
     GtkWidget *RepoSignCheckCombo;
     GtkWidget *RepoSourceButton;
@@ -311,6 +312,8 @@ void on_password_accept();
 
 void on_password_open(GtkWidget *, web_publication_add_window *window);
 
+void on_scrolled_window_size_allocate(GtkWidget *, GdkRectangle *allocation, repo_add_window *window);
+
 password_window *yon_password_window_new();
 repo_add_window *yon_repo_add_window_new();
 web_publication_add_window *yon_web_publication_add_window_new();
diff --git a/ubl-settings-update-repo-add.glade b/ubl-settings-update-repo-add.glade
index 85357fb..e006d8b 100644
--- a/ubl-settings-update-repo-add.glade
+++ b/ubl-settings-update-repo-add.glade
@@ -234,13 +234,14 @@ Configuration - configuration path</property>
                                   <object class="GtkScrolledWindow">
                                     <property name="visible">True</property>
                                     <property name="can-focus">True</property>
-                                    <property name="min-content-height">100</property>
+                                    <property name="min-content-height">0</property>
+                                    <property name="max-content-height">100</property>
                                     <child>
                                       <object class="GtkViewport">
                                         <property name="visible">True</property>
                                         <property name="can-focus">False</property>
                                         <child>
-                                          <object class="GtkBox">
+                                          <object class="GtkBox" id="SourceListBox">
                                             <property name="visible">True</property>
                                             <property name="can-focus">False</property>
                                             <property name="spacing">5</property>