diff --git a/OP_merge_layers.py b/OP_merge_layers.py
index 3ee29a3..56cd90e 100644
--- a/OP_merge_layers.py
+++ b/OP_merge_layers.py
@@ -210,10 +210,11 @@ def merge_compositor_preview(scene=None, clear=False):
 
     # Create inputs and links to node_group
     for rln in comp_list:
-        sockin = ng.node_tree.inputs.new('NodeSocketColor', rln.layer)
+        if bpy.app.version < (4,0,0):
+            sockin = ng.node_tree.inputs.new('NodeSocketColor', rln.layer)
+        else:
+            sockin = ng.node_tree.interface.new_socket(rln.layer, in_out='INPUT', socket_type='NodeSocketColor')
         sockin = ng.inputs[-1]
-        # sockin = ng.inputs.new('NodeSocketColor', rln.layer)
-        # sockin = ng.inputs[-1]
         links.new(rln.outputs['Image'], sockin)
 
     fn.nodegroup_merge_inputs(ng.node_tree, aa=False) # do not create AA node (needed ?)
diff --git a/__init__.py b/__init__.py
index 61d2fb0..e7226b7 100644
--- a/__init__.py
+++ b/__init__.py
@@ -2,7 +2,7 @@ bl_info = {
     "name": "GP Render",
     "description": "Organise export of gp layers through compositor output",
     "author": "Samuel Bernou",
-    "version": (1, 5, 0),
+    "version": (1, 5, 1),
     "blender": (3, 0, 0),
     "location": "View3D",
     "warning": "",
diff --git a/fn.py b/fn.py
index 74165a3..6d2edd2 100644
--- a/fn.py
+++ b/fn.py
@@ -63,9 +63,12 @@ def create_aa_nodegroup(tree):
         sep = create_node('CompositorNodeSepRGBA', tree=ngroup, location=(-150,0))
         comb = create_node('CompositorNodeCombRGBA', tree=ngroup, location=(350,25))
 
-        # if bpy.app.version >= (3,4,0):
-        ngroup.inputs.new('NodeSocketColor', 'Image')
-        ngroup.outputs.new('NodeSocketColor', 'Image')
+        if bpy.app.version < (4,0,0):
+            ngroup.inputs.new('NodeSocketColor', 'Image')
+            ngroup.outputs.new('NodeSocketColor', 'Image')
+        else:
+            ngroup.interface.new_socket('Image', in_out='INPUT', socket_type='NodeSocketColor')
+            ngroup.interface.new_socket('Image', in_out='OUTPUT', socket_type='NodeSocketColor')
 
         # in AA
         # ngroup.links.new(comb.outputs[0], ng_out.inputs[0]) # <- connect without out AA
@@ -614,19 +617,40 @@ def reorder_inputs(ng):
     inputs_names = [s.name for s in ng.inputs]
     filtered_names = [n for n in names if n in inputs_names]
 
-    for dest, name in enumerate(filtered_names):
-        ## rebuild list at each iteration so index are good
-        inputs_names = [s.name for s in ng.inputs]
-        src = inputs_names.index(name)
-        # reorder on node_tree not directly on node!
-        ng.node_tree.inputs.move(src, dest)
+    if bpy.app.version < (4,0,0):
+        for dest, name in enumerate(filtered_names):
+            ## rebuild list at each iteration so index are good
+            inputs_names = [s.name for s in ng.inputs]
+            src = inputs_names.index(name)
+            # reorder on node_tree not directly on node!
+            ng.node_tree.inputs.move(src, dest)
+        
+    else:
+        n_inputs = [s for s in ng.node_tree.interface.items_tree if s.in_out == 'INPUT']
+        for dest, name in enumerate(filtered_names):
+            item = next((s for s in ng.node_tree.interface.items_tree if s.in_out == 'INPUT' and s.name == name), None)
+            if not item: # Dbg
+                print(f'!PROBLEM with input "{name}"')
+                continue
+            # Need to offset index (inputs are listed after output in item_tree list)
+            dest = dest + n_inputs[0].position
+            ng.node_tree.interface.move(item, dest)
+            ng.node_tree.interface_update(bpy.context)
 
 def reorder_outputs(ng):
     ordered_out_name = [nis.name for nis in ng.inputs if nis.name in [o.name for o in ng.outputs]]
     for s_name in ordered_out_name:
         all_outnames = [o.name for o in ng.outputs]
         # reorder on nodetree, not on node !
-        ng.node_tree.outputs.move(all_outnames.index(s_name), ordered_out_name.index(s_name))
+        if bpy.app.version < (4,0,0):
+            ng.node_tree.outputs.move(all_outnames.index(s_name), ordered_out_name.index(s_name))
+        else:
+            item = next((s for s in ng.node_tree.interface.items_tree if s.in_out == 'OUTPUT' and s.name == s_name), None)
+            if not item: # Dbg
+                print(f'!PROBLEM with output "{s_name}"')
+                continue
+            ng.node_tree.interface.move(item, ordered_out_name.index(s_name))
+            ng.node_tree.interface_update(bpy.context)
 
 def clear_disconnected(fo):
     for inp in reversed(fo.inputs):
diff --git a/gen_vlayer.py b/gen_vlayer.py
index 92a5b3e..e2aea53 100644
--- a/gen_vlayer.py
+++ b/gen_vlayer.py
@@ -106,7 +106,10 @@ def connect_render_layer(rlayer, ng=None, out=None, frame=None):
     if not rlayer.outputs['Image'].is_linked:
         sockin = ng.inputs.get(vl_name)
         if not sockin:
-            sockin = ng.node_tree.inputs.new('NodeSocketColor', vl_name)
+            if bpy.app.version < (4,0,0):
+                sockin = ng.node_tree.inputs.new('NodeSocketColor', vl_name)
+            else:
+                sockin = ng.node_tree.interface.new_socket(vl_name, in_out='INPUT', socket_type='NodeSocketColor')
             sockin = ng.inputs[-1]
 
         links.new(rlayer.outputs['Image'], sockin)
@@ -119,7 +122,10 @@ def connect_render_layer(rlayer, ng=None, out=None, frame=None):
         if not s.is_linked: # and not any(x.layer == s.name for x in rl_nodes)
             print(f'removing grp unlinked input {s.name}')
             # ng.inputs.remove(s)
-            ng.node_tree.inputs.remove(s)
+            if bpy.app.version < (4,0,0):
+                ng.node_tree.inputs.remove(s)
+            else:
+                ng.node_tree.interface.items_tree.remove(s)
 
     ## get nodes from linked NG inputs ??? maybe more clear...
     # rl_nodes = [s.links[0].from_node for s in ng.inputs if s.links and s.links[0].from_node and s.links[0].from_node.type == 'R_LAYERS']
@@ -145,7 +151,11 @@ def connect_render_layer(rlayer, ng=None, out=None, frame=None):
         aa = fn.create_aa_nodegroup(ngroup)# fn.new_aa_node(ngroup)
         groupout = ng.outputs.get(vl_name)
         if not groupout:
-            ng.node_tree.outputs.new('NodeSocketColor', vl_name) # assigning direcly doesn't link well
+            if bpy.app.version < (4,0,0):
+                ng.node_tree.outputs.new('NodeSocketColor', vl_name) # assigning direcly doesn't link well
+            else:
+                ng.node_tree.interface.new_socket(vl_name, in_out='OUTPUT', socket_type='NodeSocketColor')
+
             groupout = ng.outputs[-1]
 
         # print('ng_out.inputs.get(vl_name): ', ng_out.inputs.get(vl_name))
@@ -158,11 +168,19 @@ def connect_render_layer(rlayer, ng=None, out=None, frame=None):
 
     fn.reorganise_NG_nodegroup(ng) # decorative
 
-    # clean outputs
-    for o in reversed(ngroup.outputs):
-        if not o.name in [o.name for o in ngroup.inputs]:
-            print(f'removing group output {o.name} (name not exists in group inputs)')
-            ngroup.outputs.remove(o)
+    # Clean outputs
+    if bpy.app.version < (4,0,0):
+        for o in reversed(ngroup.outputs):
+            if not o.name in [o.name for o in ngroup.inputs]:
+                print(f'removing group output {o.name} (name not exists in group inputs)')
+                ngroup.outputs.remove(o)
+    else:
+        n_outputs = [s for s in ngroup.interface.items_tree if s.in_out == 'OUTPUT']
+        n_inputs = [s for s in ngroup.interface.items_tree if s.in_out == 'INPUT']
+        for o in reversed(n_outputs):
+            if not o.name in [o.name for o in n_inputs]:
+                print(f'Removing group output {o.name} (name not exists in group inputs)')
+                ngroup.interface.remove(o)
 
     ng.update()
     # reorder output to match inputs