diff --git a/pyproject.toml b/pyproject.toml
index d0d6491..59b45c1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,6 +12,9 @@ classifiers = [
   "Programming Language :: Python :: 3.12",
   "Programming Language :: Python :: 3.13",
 ]
+dependencies = [
+    "packaging~=23.1",
+]
 
 [tool.isort]
 include_trailing_comma = true
@@ -36,10 +39,6 @@ python-source = "python"
 [tool.poetry]
 package-mode = false
 
-[tool.poetry.dependencies]
-python = "^3.8"
-packaging = "^23.1"
-
 [tool.poetry.group.dev.dependencies]
 maturin = "^1.7.4"
 pre-commit = "^3.0.1"