diff --git a/pyproject.toml b/pyproject.toml
index cf0cfd1..cba355f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "dddetailer"
-version = "23.4.0"
+version = "23.4.1"
 description = "An object detection and auto-mask extension for Stable Diffusion web UI."
 authors = [
     {name = "dowon", email = "ks2515@naver.com"},
diff --git a/scripts/ddetailer.py b/scripts/ddetailer.py
index 24b53f7..5860f47 100644
--- a/scripts/ddetailer.py
+++ b/scripts/ddetailer.py
@@ -56,6 +56,12 @@ def list_models(model_path):
 
 
 def startup():
+    from launch import is_installed, run, python
+
+    if not is_installed("mmdet"):
+        run(f'"{python}" -m pip install openmim', desc="Installing openmim", errdesc="Couldn't install openmim")
+        run(f'"{python}" -m mim install mmcv>=2.0.0 mmdet>=3.0.0', desc="Installing mmdet", errdesc="Couldn't install mmdet")
+
     if len(list_models(dd_models_path)) == 0:
         print("No detection models found, downloading...")
         bbox_path = os.path.join(dd_models_path, "bbox")