diff --git a/Cargo.lock b/Cargo.lock
index 3fc69e0..30c1136 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,9 +4,9 @@ version = 3
 
 [[package]]
 name = "autocfg"
-version = "1.1.0"
+version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+checksum = "f1fdabc7756949593fe60f30ec81974b613357de856987752631dea1e3394c80"
 
 [[package]]
 name = "bitflags"
@@ -28,15 +28,15 @@ checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
 
 [[package]]
 name = "indoc"
-version = "2.0.4"
+version = "2.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e186cfbae8084e513daff4240b4797e342f988cecda4fb6c939150f96315fd8"
+checksum = "b248f5224d1d606005e02c97f5aa4e88eeb230488bcc03bc9ca4d7991399f2b5"
 
 [[package]]
 name = "libc"
-version = "0.2.151"
+version = "0.2.153"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "302d7ab3130588088d277783b1e2d2e10c9e9e4a16dd9050e6ec93fb3e7048f4"
+checksum = "9c198f91728a82281a64e1f4f9eeb25d82cb32a5de251c6bd1b5154d63a8e7bd"
 
 [[package]]
 name = "lock_api"
@@ -50,9 +50,9 @@ dependencies = [
 
 [[package]]
 name = "memoffset"
-version = "0.9.0"
+version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5a634b1c61a95585bd15607c6ab0c4e5b226e695ff2800ba0cdccddf208c406c"
+checksum = "488016bfae457b036d996092f6cb448677611ce4449e970ceaf42695203f218a"
 dependencies = [
  "autocfg",
 ]
@@ -86,26 +86,33 @@ dependencies = [
  "windows-targets",
 ]
 
+[[package]]
+name = "portable-atomic"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7170ef9988bc169ba16dd36a7fa041e5c4cbeb6a35b76d4c03daded371eae7c0"
+
 [[package]]
 name = "proc-macro2"
-version = "1.0.73"
+version = "1.0.79"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2dd5e8a1f1029c43224ad5898e50140c2aebb1705f19e67c918ebf5b9e797fe1"
+checksum = "e835ff2298f5721608eb1a980ecaee1aef2c132bf95ecc026a11b7bf3c01c02e"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "pyo3"
-version = "0.20.1"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e82ad98ce1991c9c70c3464ba4187337b9c45fcbbb060d46dca15f0c075e14e2"
+checksum = "a02a88a17e74cadbc8ce77855e1d6c8ad0ab82901a4a9b5046bd01c1c0bd95cd"
 dependencies = [
  "cfg-if",
  "indoc",
  "libc",
  "memoffset",
  "parking_lot",
+ "portable-atomic",
  "pyo3-build-config",
  "pyo3-ffi",
  "pyo3-macros",
@@ -114,9 +121,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-build-config"
-version = "0.20.1"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5503d0b3aee2c7a8dbb389cd87cd9649f675d4c7f60ca33699a3e3859d81a891"
+checksum = "a5eb0b6ecba38961f6f4bd6cd5906dfab3cd426ff37b2eed5771006aa31656f1"
 dependencies = [
  "once_cell",
  "target-lexicon",
@@ -124,9 +131,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-ffi"
-version = "0.20.1"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "18a79e8d80486a00d11c0dcb27cd2aa17c022cc95c677b461f01797226ba8f41"
+checksum = "ba8a6e48a29b5d22e4fdaf132d8ba8d3203ee9f06362d48f244346902a594ec3"
 dependencies = [
  "libc",
  "pyo3-build-config",
@@ -134,9 +141,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros"
-version = "0.20.1"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1f4b0dc7eaa578604fab11c8c7ff8934c71249c61d4def8e272c76ed879f03d4"
+checksum = "4e80493c5965f94a747d0782a607b2328a4eea5391327b152b00e2f3b001cede"
 dependencies = [
  "proc-macro2",
  "pyo3-macros-backend",
@@ -146,21 +153,22 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros-backend"
-version = "0.20.1"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "816a4f709e29ddab2e3cdfe94600d554c5556cad0ddfeea95c47b580c3247fa4"
+checksum = "fcd7d86f42004025200e12a6a8119bd878329e6fddef8178eaafa4e4b5906c5b"
 dependencies = [
  "heck",
  "proc-macro2",
+ "pyo3-build-config",
  "quote",
  "syn",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.34"
+version = "1.0.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "22a37c9326af5ed140c86a46655b5278de879853be5573c01df185b6f49a580a"
+checksum = "291ec9ab5efd934aaf503a6466c5d5251535d108ee747472c3977cc5acc868ef"
 dependencies = [
  "proc-macro2",
 ]
@@ -176,7 +184,7 @@ dependencies = [
 
 [[package]]
 name = "rlviser-py"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "pyo3",
 ]
@@ -189,15 +197,15 @@ checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
 
 [[package]]
 name = "smallvec"
-version = "1.11.2"
+version = "1.13.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4dccd0940a2dcdf68d092b8cbab7dc0ad8fa938bf95787e1b916b0e3d0e8e970"
+checksum = "3c5e1a9a646d36c3599cd173a41282daf47c44583ad367b8e6837255952e5c67"
 
 [[package]]
 name = "syn"
-version = "2.0.44"
+version = "2.0.57"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "92d27c2c202598d05175a6dd3af46824b7f747f8d8e9b14c623f19fa5069735d"
+checksum = "11a6ae1e52eb25aab8f3fb9fca13be982a373b8f1157ca14b897a825ba4a2d35"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -206,9 +214,9 @@ dependencies = [
 
 [[package]]
 name = "target-lexicon"
-version = "0.12.12"
+version = "0.12.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "14c39fd04924ca3a864207c66fc2cd7d22d7c016007f9ce846cbb9326331930a"
+checksum = "e1fc403891a21bcfb7c37834ba66a547a8f402146eba7265b5a6d88059c9ff2f"
 
 [[package]]
 name = "unicode-ident"
diff --git a/Cargo.toml b/Cargo.toml
index 3161a66..4434d1d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "rlviser-py"
-version = "0.6.3"
+version = "0.6.4"
 edition = "2021"
 description = "Python implementation that manages a UDP connection to RLViser"
 license = "MIT"
@@ -16,7 +16,7 @@ name = "rlviser_py"
 crate-type = ["cdylib"]
 
 [dependencies]
-pyo3 = "0.20.0"
+pyo3 = "0.21.0"
 
 [profile.release]
 lto = true
diff --git a/pyproject.toml b/pyproject.toml
index 5cacfd9..056f499 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,6 +11,5 @@ classifiers = [
     "Programming Language :: Python :: Implementation :: PyPy",
 ]
 
-
 [tool.maturin]
 features = ["pyo3/extension-module", "pyo3/abi3-py37"]
diff --git a/rlviser_py.pyi b/rlviser_py.pyi
index 12c727c..5a66078 100644
--- a/rlviser_py.pyi
+++ b/rlviser_py.pyi
@@ -1,4 +1,4 @@
-from typing import List, Optional, Tuple
+from typing import Sequence, Optional, Tuple
 
 from RocketSim import BallState, CarConfig, CarState, GameMode, Team
 
@@ -7,13 +7,13 @@ type TRotmat = Tuple[TVec3, TVec3, TVec3]
 type TBall = Tuple[TVec3, TRotmat, TVec3, TVec3]
 type TCar = Tuple[int, TVec3, TRotmat, TVec3, TVec3, float, bool, bool, bool, float]
 
-def set_boost_pad_locations(locations: List[TVec3]) -> ...:
+def set_boost_pad_locations(locations: Sequence[TVec3]) -> ...:
     pass
 
-def get_state_set() -> Optional[Tuple[List[float], TBall, List[TCar]]]:
+def get_state_set() -> Optional[Tuple[Sequence[float], TBall, Sequence[TCar]]]:
     pass
 
-def render(tick_count: int, tick_rate: float, game_mode: GameMode, boost_pad_states: List[bool], ball: BallState, cars: List[Tuple[int, CarState]]) -> ...:
+def render(tick_count: int, tick_rate: float, game_mode: GameMode, boost_pad_states: Sequence[bool], ball: BallState, cars: Sequence[Tuple[int, CarState]]) -> ...:
     pass
 
 def quit() -> ...:
diff --git a/src/lib.rs b/src/lib.rs
index 676349c..e078cd2 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -15,8 +15,8 @@ macro_rules! pynamedmodule {
         #[doc = $doc]
         #[pymodule]
         #[allow(redundant_semicolons)]
-        fn $name(_py: Python, m: &PyModule) -> PyResult<()> {
-            $(m.add_function(wrap_pyfunction!($func_name, m)?)?);*;
+        fn $name(_py: Python, m: Bound<PyModule>) -> PyResult<()> {
+            $(m.add_function(wrap_pyfunction!($func_name, &m)?)?);*;
             $(m.add($var_name, $value)?);*;
             Ok(())
         }
@@ -38,7 +38,7 @@ pynamedmodule! {
 }
 
 thread_local! {
-    static BOOST_PAD_LOCATIONS: RefCell<Vec<Vec3>> = RefCell::new(Vec::new());
+    static BOOST_PAD_LOCATIONS: RefCell<Vec<Vec3>> = const { RefCell::new(Vec::new()) };
 }
 
 /// Set the boost pad locations to send to RLViser in each packet