diff --git a/instant-distance-py/Cargo.toml b/instant-distance-py/Cargo.toml
index dadd01e..d1d2a00 100644
--- a/instant-distance-py/Cargo.toml
+++ b/instant-distance-py/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "instant-distance-py"
-version = "0.3.1"
+version = "0.3.2"
 authors = ["Dirkjan Ochtman <dirkjan@ochtman.nl>"]
 edition = "2018"
 license = "MIT OR Apache-2.0"
@@ -17,9 +17,9 @@ crate-type = ["cdylib"]
 [dependencies]
 bincode = "1.3.1"
 instant-distance = { version = "0.5", path = "../instant-distance", features = ["with-serde"] }
-pyo3 = { version = "0.15", features = ["extension-module"] }
+pyo3 = { version = "0.16", features = ["extension-module"] }
 serde = { version = "1", features = ["derive"] }
-serde-big-array = "0.3.2"
+serde-big-array = "0.4.1"
 
 [package.metadata.maturin]
 name = "instant-distance"
diff --git a/instant-distance-py/src/lib.rs b/instant-distance-py/src/lib.rs
index d4f4b34..9ad2385 100644
--- a/instant-distance-py/src/lib.rs
+++ b/instant-distance-py/src/lib.rs
@@ -11,7 +11,7 @@ use pyo3::proc_macro::{pyclass, pymethods, pymodule};
 use pyo3::types::{PyList, PyModule, PyString};
 use pyo3::{Py, PyAny, PyErr, PyObject, PyRef, PyRefMut, PyResult, Python};
 use serde::{Deserialize, Serialize};
-use serde_big_array::big_array;
+use serde_big_array::BigArray;
 
 #[pymodule]
 fn instant_distance(_: Python, m: &PyModule) -> PyResult<()> {
@@ -362,8 +362,6 @@ impl TryFrom<&PyAny> for FloatArray {
     }
 }
 
-big_array! { BigArray; DIMENSIONS }
-
 impl Point for FloatArray {
     fn distance(&self, rhs: &Self) -> f32 {
         #[cfg(target_arch = "x86_64")]
diff --git a/instant-distance/Cargo.toml b/instant-distance/Cargo.toml
index 9ce8675..b1aa366 100644
--- a/instant-distance/Cargo.toml
+++ b/instant-distance/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "instant-distance"
-version = "0.5.0"
+version = "0.5.1"
 license = "MIT OR Apache-2.0"
 authors = ["Dirkjan Ochtman <dirkjan@ochtman.nl>"]
 edition = "2018"
@@ -18,11 +18,11 @@ with-serde = ["serde", "serde-big-array"]
 indicatif = { version = "0.16", optional = true }
 num_cpus = "1.13"
 ordered-float = "2.0"
-parking_lot = "0.11"
+parking_lot = "0.12"
 rand = { version = "0.8", features = ["small_rng"] }
 rayon = "1.5"
 serde = { version = "1.0.118", features = ["derive"], optional = true }
-serde-big-array = { version = "0.3.1", optional = true }
+serde-big-array = { version = "0.4.1", optional = true }
 
 [dev-dependencies]
 bencher = "0.1.5"
diff --git a/instant-distance/src/types.rs b/instant-distance/src/types.rs
index f2845f1..d6a03fe 100644
--- a/instant-distance/src/types.rs
+++ b/instant-distance/src/types.rs
@@ -6,7 +6,7 @@ use parking_lot::{MappedRwLockReadGuard, RwLock, RwLockReadGuard};
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};
 #[cfg(feature = "serde-big-array")]
-use serde_big_array::big_array;
+use serde_big_array::BigArray;
 
 use crate::{Hnsw, Point, M};
 
@@ -84,9 +84,6 @@ pub(crate) struct ZeroNode(
     #[cfg_attr(feature = "serde", serde(with = "BigArray"))] pub(crate) [PointId; M * 2],
 );
 
-#[cfg(feature = "serde-big-array")]
-big_array! { BigArray; }
-
 impl ZeroNode {
     pub(crate) fn rewrite(&mut self, mut iter: impl Iterator<Item = PointId>) {
         for slot in self.0.iter_mut() {