diff --git a/pyproject.toml b/pyproject.toml
index 37caf54..2aa30e6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "vsdpir"
-version = "3.1.1"
+version = "4.0.0"
 description = "DPIR function for VapourSynth"
 readme = "README.md"
 requires-python = ">=3.10"
diff --git a/vsdpir/__init__.py b/vsdpir/__init__.py
index 6ce0563..b1da109 100644
--- a/vsdpir/__init__.py
+++ b/vsdpir/__init__.py
@@ -13,7 +13,7 @@
 
 from .network_unet import UNetRes
 
-__version__ = "3.1.1"
+__version__ = "4.0.0"
 
 os.environ["CUDA_MODULE_LOADING"] = "LAZY"