diff --git a/comfy_extras/nodes_load_3d.py b/comfy_extras/nodes_load_3d.py
index d5b4d9111..40d03e18a 100644
--- a/comfy_extras/nodes_load_3d.py
+++ b/comfy_extras/nodes_load_3d.py
@@ -16,7 +16,7 @@ class Load3D():
 
         os.makedirs(input_dir, exist_ok=True)
 
-        files = [normalize_path(os.path.join("3d", f)) for f in os.listdir(input_dir) if f.endswith(('.gltf', '.glb', '.obj', '.mtl', '.fbx', '.stl'))]
+        files = [normalize_path(os.path.join("3d", f)) for f in os.listdir(input_dir) if f.endswith(('.gltf', '.glb', '.obj', '.fbx', '.stl'))]
 
         return {"required": {
             "model_file": (sorted(files), {"file_upload": True}),
diff --git a/node_helpers.py b/node_helpers.py
index c3e1a14ca..4ff960ef8 100644
--- a/node_helpers.py
+++ b/node_helpers.py
@@ -5,12 +5,18 @@ from comfy.cli_args import args
 
 from PIL import ImageFile, UnidentifiedImageError
 
-def conditioning_set_values(conditioning, values={}):
+def conditioning_set_values(conditioning, values={}, append=False):
     c = []
     for t in conditioning:
         n = [t[0], t[1].copy()]
         for k in values:
-            n[1][k] = values[k]
+            val = values[k]
+            if append:
+                old_val = n[1].get(k, None)
+                if old_val is not None:
+                    val = old_val + val
+
+            n[1][k] = val
         c.append(n)
 
     return c
diff --git a/nodes.py b/nodes.py
index 95e831b8b..1e328651b 100644
--- a/nodes.py
+++ b/nodes.py
@@ -1103,16 +1103,7 @@ class unCLIPConditioning:
         if strength == 0:
             return (conditioning, )
 
-        c = []
-        for t in conditioning:
-            o = t[1].copy()
-            x = {"clip_vision_output": clip_vision_output, "strength": strength, "noise_augmentation": noise_augmentation}
-            if "unclip_conditioning" in o:
-                o["unclip_conditioning"] = o["unclip_conditioning"][:] + [x]
-            else:
-                o["unclip_conditioning"] = [x]
-            n = [t[0], o]
-            c.append(n)
+        c = node_helpers.conditioning_set_values(conditioning, {"unclip_conditioning": [{"clip_vision_output": clip_vision_output, "strength": strength, "noise_augmentation": noise_augmentation}]}, append=True)
         return (c, )
 
 class GLIGENLoader:
diff --git a/requirements.txt b/requirements.txt
index 858e6343c..5a988ecd9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-comfyui-frontend-package==1.19.9
+comfyui-frontend-package==1.20.4
 comfyui-workflow-templates==0.1.18
 torch
 torchsde