diff --git a/fooocus_version.py b/fooocus_version.py
index 56d58fc5..c2b4e1dc 100644
--- a/fooocus_version.py
+++ b/fooocus_version.py
@@ -1 +1 @@
-version = '1.0.36'
+version = '1.0.39'
diff --git a/modules/async_worker.py b/modules/async_worker.py
index 28b8d15d..0a9fcba5 100644
--- a/modules/async_worker.py
+++ b/modules/async_worker.py
@@ -45,10 +45,10 @@ def worker():
 
         if performance_selction == 'Speed':
             steps = 30
-            switch = 20
+            switch = 15
         else:
             steps = 60
-            switch = 40
+            switch = 30
 
         width, height = aspect_ratios[aspect_ratios_selction]
 
diff --git a/update_log.md b/update_log.md
index 8f60d91b..e87fc019 100644
--- a/update_log.md
+++ b/update_log.md
@@ -1,3 +1,8 @@
+### 1.0.39
+
+* Reverted unstable changes between 1.0.37 and 1.0.38 .
+* Increased refiner steps to half of sampling steps.
+
 ### 1.0.36
 
 * Change gaussian kernel to anisotropic kernel.