diff --git a/Cargo.lock b/Cargo.lock
index 910e9b456..cb04a926b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -329,9 +329,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3"
-version = "0.21.0-beta.0"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5d0c41d899f822e5f39186d6da130a822a0a43edb19992b51bf4ef6cd0b4cfd1"
+checksum = "a02a88a17e74cadbc8ce77855e1d6c8ad0ab82901a4a9b5046bd01c1c0bd95cd"
 dependencies = [
  "cfg-if",
  "indoc",
@@ -348,9 +348,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-build-config"
-version = "0.21.0-beta.0"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5509c2aa78c7e770077e41ba86f806e60dcee812e924ccb2d6fe78c0a0128ce2"
+checksum = "a5eb0b6ecba38961f6f4bd6cd5906dfab3cd426ff37b2eed5771006aa31656f1"
 dependencies = [
  "once_cell",
  "python3-dll-a",
@@ -359,9 +359,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-ffi"
-version = "0.21.0-beta.0"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e6bb234a86ed619a661f3bb3c2493aaff9cb937e33e198d17f5f20a15881e155"
+checksum = "ba8a6e48a29b5d22e4fdaf132d8ba8d3203ee9f06362d48f244346902a594ec3"
 dependencies = [
  "libc",
  "pyo3-build-config",
@@ -369,9 +369,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros"
-version = "0.21.0-beta.0"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0b787de2c6832eb1eb393c9f82f976a5a87bda979780d9b853878846a8d2e4b"
+checksum = "4e80493c5965f94a747d0782a607b2328a4eea5391327b152b00e2f3b001cede"
 dependencies = [
  "proc-macro2",
  "pyo3-macros-backend",
@@ -381,9 +381,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros-backend"
-version = "0.21.0-beta.0"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5e3b7beed357786d2afe845871964e824ad8af0df38a403f7d01cdc81aadb211"
+checksum = "fcd7d86f42004025200e12a6a8119bd878329e6fddef8178eaafa4e4b5906c5b"
 dependencies = [
  "heck",
  "proc-macro2",
diff --git a/Cargo.toml b/Cargo.toml
index 46b1ed4ca..c0022a3cf 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,7 +27,7 @@ include = [
 rust-version = "1.76"
 
 [dependencies]
-pyo3 = { version = "0.21.0-beta.0", features = ["generate-import-lib", "num-bigint"] }
+pyo3 = { version = "0.21.0", features = ["generate-import-lib", "num-bigint"] }
 regex = "1.10.3"
 strum = { version = "0.25.0", features = ["derive"] }
 strum_macros = "0.26.1"
@@ -71,12 +71,12 @@ debug = true
 strip = false
 
 [dev-dependencies]
-pyo3 = { version = "0.21.0-beta.0", features = ["auto-initialize"] }
+pyo3 = { version = "0.21.0", features = ["auto-initialize"] }
 
 [build-dependencies]
 version_check = "0.9.4"
 # used where logic has to be version/distribution specific, e.g. pypy
-pyo3-build-config = { version = "0.21.0-beta.0" }
+pyo3-build-config = { version = "0.21.0" }
 
 [lints.clippy]
 dbg_macro = "warn"
diff --git a/src/argument_markers.rs b/src/argument_markers.rs
index b3ca97c8d..4a9e80bbd 100644
--- a/src/argument_markers.rs
+++ b/src/argument_markers.rs
@@ -30,7 +30,7 @@ impl ArgsKwargs {
 #[pymethods]
 impl ArgsKwargs {
     #[new]
-    fn py_new(py: Python, args: &PyTuple, kwargs: Option<&Bound<'_, PyDict>>) -> Self {
+    fn py_new(py: Python, args: &Bound<'_, PyTuple>, kwargs: Option<&Bound<'_, PyDict>>) -> Self {
         Self {
             args: args.into_py(py),
             kwargs: match kwargs {