diff --git a/modules/errors.py b/modules/errors.py
index d4238e63..192cd8ff 100644
--- a/modules/errors.py
+++ b/modules/errors.py
@@ -94,7 +94,7 @@ def check_versions():
     import gradio
 
     expected_torch_version = "2.0.0"
-    expected_xformers_version = "0.0.21"
+    expected_xformers_version = "0.0.20"
     expected_gradio_version = "3.39.0"
 
     if version.parse(torch.__version__) < version.parse(expected_torch_version):
diff --git a/modules/launch_utils.py b/modules/launch_utils.py
index c54e199f..7e4d5a61 100644
--- a/modules/launch_utils.py
+++ b/modules/launch_utils.py
@@ -310,7 +310,7 @@ def prepare_environment():
     torch_command = os.environ.get('TORCH_COMMAND', f"pip install torch==2.0.1 torchvision==0.15.2 --extra-index-url {torch_index_url}")
     requirements_file = os.environ.get('REQS_FILE', "requirements_versions.txt")
 
-    xformers_package = os.environ.get('XFORMERS_PACKAGE', 'xformers==0.0.21')
+    xformers_package = os.environ.get('XFORMERS_PACKAGE', 'xformers==0.0.20')
     clip_package = os.environ.get('CLIP_PACKAGE', "https://github.com/openai/CLIP/archive/d50d76daa670286dd6cacf3bcd80b5e4823fc8e1.zip")
     openclip_package = os.environ.get('OPENCLIP_PACKAGE', "https://github.com/mlfoundations/open_clip/archive/bb6e834e9c70d9c27d0dc3ecedeebeaeb1ffad6b.zip")