diff --git a/src/pdm/backend/_vendor/pyproject_metadata/__init__.py b/src/pdm/backend/_vendor/pyproject_metadata/__init__.py
index 41b9335..5e1e001 100644
--- a/src/pdm/backend/_vendor/pyproject_metadata/__init__.py
+++ b/src/pdm/backend/_vendor/pyproject_metadata/__init__.py
@@ -69,7 +69,7 @@
 import pdm.backend._vendor.packaging.utils
 import pdm.backend._vendor.packaging.version
 
-__version__ = "0.9.0rc1"
+__version__ = "0.9.0"
 
 __all__ = [
     "ConfigurationError",
diff --git a/src/pdm/backend/_vendor/vendor.txt b/src/pdm/backend/_vendor/vendor.txt
index e15308f..3b92126 100644
--- a/src/pdm/backend/_vendor/vendor.txt
+++ b/src/pdm/backend/_vendor/vendor.txt
@@ -1,5 +1,5 @@
 packaging==24.1
 tomli==2.0.1
 tomli_w==1.0.0
-pyproject-metadata==0.9.0rc1
+pyproject-metadata==0.9.0
 editables==0.5