diff --git a/composable_lora.py b/composable_lora.py
index cdafb7c..f6c7509 100644
--- a/composable_lora.py
+++ b/composable_lora.py
@@ -1,4 +1,4 @@
-from typing import List, Dict
+from typing import List, Dict, Optional
 import re
 import torch
 import composable_lora_step
@@ -31,7 +31,7 @@ def lora_forward(compvis_module, input, res):
     if len(lora.loaded_loras) == 0:
         return res
 
-    lora_layer_name_loading : str | None = getattr(compvis_module, 'lora_layer_name', None)
+    lora_layer_name_loading : Optional[str] = getattr(compvis_module, 'lora_layer_name', None)
     if lora_layer_name_loading is None:
         return res
     #let it type is actually a string
diff --git a/composable_lora_step.py b/composable_lora_step.py
index 00abcee..ebd9b31 100644
--- a/composable_lora_step.py
+++ b/composable_lora_step.py
@@ -1,4 +1,4 @@
-from typing import List
+from typing import List, Union
 import re
 import ast
 import copy
@@ -192,7 +192,7 @@ class LoRA_Controller(LoRA_Controller_Base):
 
 #lora with start and end
 class LoRA_StartEnd_Controller(LoRA_Controller_Base):
-    def __init__(self, name : str, weight : float, start : float | int, end : float | int):
+    def __init__(self, name : str, weight : float, start : Union[float, int], end : Union[float, int]):
         super().__init__()
         self.name = name
         self.weight = float(weight)
@@ -218,7 +218,7 @@ class LoRA_StartEnd_Controller(LoRA_Controller_Base):
 
 #switch lora
 class LoRA_Switcher_Controller(LoRA_Controller_Base):
-    def __init__(self, lora_dist : List[LoRA_data], start : float | int, end : float | int):
+    def __init__(self, lora_dist : List[LoRA_data], start : Union[float, int], end : Union[float, int]):
         super().__init__()
         self.lora_dist = lora_dist
         the_list : List[str] = []
@@ -356,7 +356,7 @@ def extra_net_split(input_str : str, pattern : str):
         return [input_str]
     return result
 
-def extra_net_re_search(pattern : str | re.Pattern[str], input_str : str):
+def extra_net_re_search(pattern : Union[str, re.Pattern[str]], input_str : str):
     result = MySearchResult()
     extra_net_list : List[str] = []
     escape_obj_list : List[str] = []
diff --git a/composable_lycoris.py b/composable_lycoris.py
index 809d011..9155725 100644
--- a/composable_lycoris.py
+++ b/composable_lycoris.py
@@ -1,3 +1,4 @@
+from typing import Optional
 import torch
 from modules import shared
 
@@ -9,7 +10,7 @@ def lycoris_forward(compvis_module, input, res):
     if len(lycoris.loaded_lycos) == 0:
         return res
     
-    lycoris_layer_name_loading : str | None = getattr(compvis_module, 'lyco_layer_name', None)
+    lycoris_layer_name_loading : Optional[str] = getattr(compvis_module, 'lyco_layer_name', None)
     if lycoris_layer_name_loading is None:
         return res
     #let it type is actually a string