diff --git a/doc/classes/GraphNode.xml b/doc/classes/GraphNode.xml
index f4ffe3872d9..878b903af03 100644
--- a/doc/classes/GraphNode.xml
+++ b/doc/classes/GraphNode.xml
@@ -226,6 +226,13 @@
 				Emitted when the GraphNode is moved.
 			</description>
 		</signal>
+		<signal name="slot_updated">
+			<argument index="0" name="idx" type="int">
+			</argument>
+			<description>
+				Emitted when any GraphNode's slot is updated.
+			</description>
+		</signal>
 		<signal name="raise_request">
 			<description>
 				Emitted when the GraphNode is requested to be displayed over other ones. Happens on focusing (clicking into) the GraphNode.
diff --git a/scene/gui/graph_edit.cpp b/scene/gui/graph_edit.cpp
index 4ea0c22ddb9..96b93337ded 100644
--- a/scene/gui/graph_edit.cpp
+++ b/scene/gui/graph_edit.cpp
@@ -396,6 +396,15 @@ void GraphEdit::_graph_node_moved(Node *p_gn) {
 	connections_layer->update();
 }
 
+void GraphEdit::_graph_node_slot_updated(int p_index, Node *p_gn) {
+	GraphNode *gn = Object::cast_to<GraphNode>(p_gn);
+	ERR_FAIL_COND(!gn);
+	top_layer->update();
+	minimap->update();
+	update();
+	connections_layer->update();
+}
+
 void GraphEdit::add_child_notify(Node *p_child) {
 
 	Control::add_child_notify(p_child);
@@ -406,6 +415,7 @@ void GraphEdit::add_child_notify(Node *p_child) {
 	if (gn) {
 		gn->set_scale(Vector2(zoom, zoom));
 		gn->connect("offset_changed", this, "_graph_node_moved", varray(gn));
+		gn->connect("slot_updated", this, "_graph_node_slot_updated", varray(gn));
 		gn->connect("raise_request", this, "_graph_node_raised", varray(gn));
 		gn->connect("item_rect_changed", connections_layer, "update");
 		gn->connect("item_rect_changed", minimap, "update");
@@ -432,6 +442,7 @@ void GraphEdit::remove_child_notify(Node *p_child) {
 	GraphNode *gn = Object::cast_to<GraphNode>(p_child);
 	if (gn) {
 		gn->disconnect("offset_changed", this, "_graph_node_moved");
+		gn->disconnect("slot_updated", this, "_graph_node_slot_updated");
 		gn->disconnect("raise_request", this, "_graph_node_raised");
 
 		// In case of the whole GraphEdit being destroyed these references can already be freed.
@@ -1659,6 +1670,7 @@ void GraphEdit::_bind_methods() {
 
 	ClassDB::bind_method(D_METHOD("_graph_node_moved"), &GraphEdit::_graph_node_moved);
 	ClassDB::bind_method(D_METHOD("_graph_node_raised"), &GraphEdit::_graph_node_raised);
+	ClassDB::bind_method(D_METHOD("_graph_node_slot_updated"), &GraphEdit::_graph_node_slot_updated);
 
 	ClassDB::bind_method(D_METHOD("_top_layer_input"), &GraphEdit::_top_layer_input);
 	ClassDB::bind_method(D_METHOD("_top_layer_draw"), &GraphEdit::_top_layer_draw);
diff --git a/scene/gui/graph_edit.h b/scene/gui/graph_edit.h
index a16c4232a72..155e390fb37 100644
--- a/scene/gui/graph_edit.h
+++ b/scene/gui/graph_edit.h
@@ -164,6 +164,7 @@ private:
 
 	void _graph_node_raised(Node *p_gn);
 	void _graph_node_moved(Node *p_gn);
+	void _graph_node_slot_updated(int p_index, Node *p_gn);
 
 	void _update_scroll();
 	void _scroll_moved(double);
diff --git a/scene/gui/graph_node.cpp b/scene/gui/graph_node.cpp
index e97ef1c8bb4..274568141b6 100644
--- a/scene/gui/graph_node.cpp
+++ b/scene/gui/graph_node.cpp
@@ -312,6 +312,8 @@ void GraphNode::set_slot(int p_idx, bool p_enable_left, int p_type_left, const C
 	slot_info[p_idx] = s;
 	update();
 	connpos_dirty = true;
+
+	emit_signal("slot_updated", p_idx);
 }
 
 void GraphNode::clear_slot(int p_idx) {
@@ -720,6 +722,7 @@ void GraphNode::_bind_methods() {
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "overlay", PROPERTY_HINT_ENUM, "Disabled,Breakpoint,Position"), "set_overlay", "get_overlay");
 
 	ADD_SIGNAL(MethodInfo("offset_changed"));
+	ADD_SIGNAL(MethodInfo("slot_updated", PropertyInfo(Variant::INT, "idx")));
 	ADD_SIGNAL(MethodInfo("dragged", PropertyInfo(Variant::VECTOR2, "from"), PropertyInfo(Variant::VECTOR2, "to")));
 	ADD_SIGNAL(MethodInfo("raise_request"));
 	ADD_SIGNAL(MethodInfo("close_request"));