diff --git a/rust/Cargo.lock b/rust/Cargo.lock
index f46bb0e..0db26df 100644
--- a/rust/Cargo.lock
+++ b/rust/Cargo.lock
@@ -115,9 +115,9 @@ dependencies = [
 
 [[package]]
 name = "ndarray"
-version = "0.16.1"
+version = "0.17.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "882ed72dce9365842bf196bdeedf5055305f11fc8c03dee7bb0194a6cad34841"
+checksum = "0c7c9125e8f6f10c9da3aad044cc918cf8784fa34de857b1aa68038eb05a50a9"
 dependencies = [
  "matrixmultiply",
  "num-complex",
@@ -158,9 +158,9 @@ dependencies = [
 
 [[package]]
 name = "numpy"
-version = "0.25.0"
+version = "0.27.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "29f1dee9aa8d3f6f8e8b9af3803006101bb3653866ef056d530d53ae68587191"
+checksum = "7aac2e6a6e4468ffa092ad43c39b81c79196c2bb773b8db4085f695efe3bba17"
 dependencies = [
  "libc",
  "ndarray",
@@ -204,9 +204,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3"
-version = "0.25.1"
+version = "0.27.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8970a78afe0628a3e3430376fc5fd76b6b45c4d43360ffd6cdd40bdde72b682a"
+checksum = "ab53c047fcd1a1d2a8820fe84f05d6be69e9526be40cb03b73f86b6b03e6d87d"
 dependencies = [
  "indoc",
  "libc",
@@ -221,19 +221,18 @@ dependencies = [
 
 [[package]]
 name = "pyo3-build-config"
-version = "0.25.1"
+version = "0.27.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "458eb0c55e7ece017adeba38f2248ff3ac615e53660d7c71a238d7d2a01c7598"
+checksum = "b455933107de8642b4487ed26d912c2d899dec6114884214a0b3bb3be9261ea6"
 dependencies = [
- "once_cell",
  "target-lexicon",
 ]
 
 [[package]]
 name = "pyo3-ffi"
-version = "0.25.1"
+version = "0.27.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7114fe5457c61b276ab77c5055f206295b812608083644a5c5b2640c3102565c"
+checksum = "1c85c9cbfaddf651b1221594209aed57e9e5cff63c4d11d1feead529b872a089"
 dependencies = [
  "libc",
  "pyo3-build-config",
@@ -241,9 +240,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros"
-version = "0.25.1"
+version = "0.27.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a8725c0a622b374d6cb051d11a0983786448f7785336139c3c94f5aa6bef7e50"
+checksum = "0a5b10c9bf9888125d917fb4d2ca2d25c8df94c7ab5a52e13313a07e050a3b02"
 dependencies = [
  "proc-macro2",
  "pyo3-macros-backend",
@@ -253,9 +252,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros-backend"
-version = "0.25.1"
+version = "0.27.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4109984c22491085343c05b0dbc54ddc405c3cf7b4374fc533f5c3313a572ccc"
+checksum = "03b51720d314836e53327f5871d4c0cfb4fb37cc2c4a11cc71907a86342c40f9"
 dependencies = [
  "heck",
  "proc-macro2",
diff --git a/rust/Cargo.toml b/rust/Cargo.toml
index eee2e75..9e114e8 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "coniferest"
 version = "0.1.2"
-edition = "2021"
+edition = "2024"
 
 [lib]
 name = "calc_trees"
@@ -22,10 +22,10 @@ default = ["pyo3/abi3-py310"]
 [dependencies]
 enum_dispatch = "0.3"
 itertools = "0.14"
-pyo3 = { version = "0.25", features = ["extension-module"] }
+pyo3 = { version = "0.27", features = ["extension-module"] }
 # Needs to be consistent with ndarray dependency in numpy
-ndarray = { version = "0.16", features = ["rayon"] }
+ndarray = { version = "0.17", features = ["rayon"] }
 num-traits = "0.2"
-numpy = "0.25"
+numpy = "0.27.1"
 # Needs to be consistent with rayon dependency in ndarray
 rayon = "1.11"
diff --git a/rust/src/selector.rs b/rust/src/selector.rs
index 498f12d..5bc6757 100644
--- a/rust/src/selector.rs
+++ b/rust/src/selector.rs
@@ -1,10 +1,10 @@
 use numpy::{Element, PyArrayDescr};
-use pyo3::prelude::{PyAnyMethods, PyDictMethods};
-use pyo3::sync::GILOnceCell;
+use pyo3::prelude::PyDictMethods;
+use pyo3::sync::PyOnceLock;
 use pyo3::types::PyDict;
-use pyo3::{py_run, Bound, Py, PyResult, Python};
+use pyo3::{Bound, Py, PyResult, Python, py_run};
 
-static SELECTOR_DTYPE_CELL: GILOnceCell<Py<PyArrayDescr>> = GILOnceCell::new();
+static SELECTOR_DTYPE_CELL: PyOnceLock<Py<PyArrayDescr>> = PyOnceLock::new();
 
 /// Selector is the representation of decision tree nodes: either branches or leafs.
 ///
@@ -50,7 +50,7 @@ impl Selector {
             .get_item("dtype")
             .expect("Error in built-in Python code for dtype initialization")
             .expect("Error in built-in Python code for dtype initialization: dtype cannot be None")
-            .downcast::<PyArrayDescr>()?.clone()
+            .cast::<PyArrayDescr>()?.clone()
             .unbind())
             })?;
         Ok(unbind_dtype.bind(py).clone())
diff --git a/rust/src/tree_traversal.rs b/rust/src/tree_traversal.rs
index f11b788..573e959 100644
--- a/rust/src/tree_traversal.rs
+++ b/rust/src/tree_traversal.rs
@@ -7,7 +7,7 @@ use num_traits::AsPrimitive;
 use numpy::{Element, PyArray1, PyArray2, PyArrayMethods};
 use pyo3::exceptions::PyValueError;
 use pyo3::prelude::PyAnyMethods;
-use pyo3::{pyfunction, Bound, FromPyObject, PyResult, Python};
+use pyo3::{Bound, FromPyObject, PyResult, Python, pyfunction};
 
 type DeltaSumHitCount<'py> = (Bound<'py, PyArray2<f64>>, Bound<'py, PyArray2<i64>>);