diff --git a/poetry.lock b/poetry.lock
index 36ab452..a279d38 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -617,36 +617,43 @@ tomlkit = ">=0.7"
 
 [[package]]
 name = "numpy"
-version = "1.25.2"
+version = "1.26.0"
 description = "Fundamental package for array computing in Python"
 optional = false
-python-versions = ">=3.9"
+python-versions = "<3.13,>=3.9"
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+    {file = "numpy-1.26.0.tar.gz", hash = "sha256:f93fc78fe8bf15afe2b8d6b6499f1c73953169fad1e9a8dd086cdff3190e7fdf"},
 ]
 
 [[package]]
@@ -1307,5 +1314,5 @@ pandas = ["pandas", "pyarrow"]
 
 [metadata]
 lock-version = "2.0"
-python-versions = "^3.9"
-content-hash = "6f87d9893ee50cca958fcbd0d96656e8a2d28c2490ee6acd66abb848604e034d"
+python-versions = "^3.9,<3.13"
+content-hash = "c9620b88cc4c84f9a845a4a4c904ca4d262583f990706bb08507580f1a53d256"
diff --git a/pyproject.toml b/pyproject.toml
index ededbcd..ba9dde4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,7 +17,8 @@ classifiers = [
 
 
 [tool.poetry.dependencies]
-python = "^3.9"
+# Ceiling at 3.12 required by numpy
+python = "^3.9,<3.13"
 polars = "^0.19"
 numpy = "^1.24"
 parsita = "^2.0"