diff --git a/mesh_tissue/colors_groups_exchanger.py b/mesh_tissue/colors_groups_exchanger.py
index c2e45e6f698605df2d25e40044403688b292e91d..8bd47b46cb57d5de8cab4b293417f734da8a3826 100644
--- a/mesh_tissue/colors_groups_exchanger.py
+++ b/mesh_tissue/colors_groups_exchanger.py
@@ -270,6 +270,7 @@ class colors_groups_exchanger_panel(bpy.types.Panel):
     bl_category = "Create"
     bl_space_type = "VIEW_3D"
     bl_region_type = "TOOLS"
+    bl_options = {'DEFAULT_CLOSED'}
     #bl_context = "objectmode"
 
     def draw(self, context):
diff --git a/mesh_tissue/dual_mesh.py b/mesh_tissue/dual_mesh.py
index a46102549b2dfdf31516a35889943c44c1b5fc56..5a4a5d1307e2e199f256798ffe300a83e29f5c50 100644
--- a/mesh_tissue/dual_mesh.py
+++ b/mesh_tissue/dual_mesh.py
@@ -218,6 +218,7 @@ class dual_mesh_panel(bpy.types.Panel):
     bl_space_type = "VIEW_3D"
     bl_region_type = "TOOLS"
     bl_context = (("objectmode"))
+    bl_options = {'DEFAULT_CLOSED'}
 
     def draw(self, context):
         layout = self.layout
diff --git a/mesh_tissue/tessellate_numpy.py b/mesh_tissue/tessellate_numpy.py
index 65afeee744c44238536b2450dabeb08b53dbaa54..001a438d7f2827bd9a5747a2ac7428671d74c5cf 100644
--- a/mesh_tissue/tessellate_numpy.py
+++ b/mesh_tissue/tessellate_numpy.py
@@ -1242,6 +1242,7 @@ class tessellate_panel(bpy.types.Panel):
     bl_category = "Create"
     bl_space_type = "VIEW_3D"
     bl_region_type = "TOOLS"
+    bl_options = {'DEFAULT_CLOSED'}
     #bl_context = "objectmode", "editmode"
 
     def draw(self, context):