diff --git a/poetry.lock b/poetry.lock
index bf1579d..b8d5eb3 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -2104,4 +2104,4 @@ type = ["pytest-mypy"]
 [metadata]
 lock-version = "2.1"
 python-versions = ">=3.9,<3.14"
-content-hash = "475a4bd95d2d3dc088d9a39fdf8b75e880fecb722c9fce9c83ac5e270b238b62"
+content-hash = "8687fc9a947ad95126fa4e882b6c84cf21abc977dbc3a6f52b1486aabd217a4f"
diff --git a/pyproject.toml b/pyproject.toml
index 8509968..cd98700 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,15 +1,17 @@
-[tool.poetry]
+[project]
 name = "guardrails-jsonformer"
-version = "0.13.0"
+version = "0.13.1"
 description = "A fork of 1rgs' jsonformer maintained by Guardrails AI"
-authors = ["1rgs <rgsduke@gmail.com>"]
-maintainers = ["Guardrails AI <contact@guardrailsai.com>"]
+authors = [
+    {name = "1rgs", email = "rgsduke@gmail.com"}
+]
+maintainers = [
+    {name = "Guardrails AI", email = "contact@guardrailsai.com"}
+]
 homepage = "https://github.com/guardrails-ai/jsonformer"
 readme = "README.md"
-package-mode = true
-packages = [
-    { include = "jsonformer", from = "." }
-]
+requires-python = ">=3.9,<4.0"
+
 
 [tool.poetry.dependencies]
 # Bc triton, a dependency of torch, requires this range
@@ -25,9 +27,15 @@ bitsandbytes = "<0.43.0"
 
 
 [build-system]
-requires = ["poetry-core"]
+requires = ["poetry-core>=2.0.0"]
 build-backend = "poetry.core.masonry.api"
 
+[tool.poetry]
+package-mode = true
+packages = [
+    { include = "jsonformer", from = "." }
+]
+
 [virtualenvs]
 create = true
 in-project = true
\ No newline at end of file