diff --git a/modules/impact/config.py b/modules/impact/config.py
index f52e3da..e0366ec 100644
--- a/modules/impact/config.py
+++ b/modules/impact/config.py
@@ -1,7 +1,7 @@
 import configparser
 import os
 
-version = "V2.13.5"
+version = "V2.13.6"
 
 dependency_version = 1
 
diff --git a/modules/impact/core.py b/modules/impact/core.py
index 2103f20..c232d02 100644
--- a/modules/impact/core.py
+++ b/modules/impact/core.py
@@ -667,7 +667,7 @@ class KSamplerWrapper:
     def __init__(self, model, seed, steps, cfg, sampler_name, scheduler, positive, negative, denoise):
         self.params = model, seed, steps, cfg, sampler_name, scheduler, positive, negative, denoise
 
-    def sample(self, latent_image, hook):
+    def sample(self, latent_image, hook=None):
         model, seed, steps, cfg, sampler_name, scheduler, positive, negative, denoise = self.params
 
         if hook is not None: