diff --git a/Cargo.toml b/Cargo.toml
index 53ec9d6..942b65c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,7 +14,7 @@ readme = "README.md"
 bitcoin = { version = "0.31.0", features = ["serde", "base64"] }
 serde = { version = "^1.0", features = ["derive"] }
 serde_json = { version = "^1.0" }
-pyo3 = { version = "0.15.1", features = ["auto-initialize"] }
+pyo3 = { version = "0.21.2", features = ["auto-initialize"] }
 
 miniscript = { version = "11.0", features = ["serde"], optional = true }
 
diff --git a/src/interface.rs b/src/interface.rs
index f5745cb..c816bfb 100644
--- a/src/interface.rs
+++ b/src/interface.rs
@@ -36,8 +36,9 @@ struct HWILib {
 impl HWILib {
     pub fn initialize() -> Result<Self, Error> {
         Python::with_gil(|py| {
-            let commands: Py<PyModule> = PyModule::import(py, "hwilib.commands")?.into();
-            let json_dumps: Py<PyAny> = PyModule::import(py, "json")?.getattr("dumps")?.into();
+            let commands: Py<PyModule> = PyModule::import_bound(py, "hwilib.commands")?.into();
+            let json_dumps: Py<PyAny> =
+                PyModule::import_bound(py, "json")?.getattr("dumps")?.into();
             Ok(HWILib {
                 commands,
                 json_dumps,
@@ -497,7 +498,7 @@ impl HWIClient {
     pub fn get_version() -> Option<String> {
         Python::with_gil(|py| {
             Some(
-                PyModule::import(py, "hwilib")
+                PyModule::import_bound(py, "hwilib")
                     .ok()?
                     .getattr("__version__")
                     .expect("Should have a __version__")
diff --git a/src/types.rs b/src/types.rs
index db8ef8e..db25a24 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -15,6 +15,7 @@ use serde::{Deserialize, Deserializer};
 
 #[cfg(feature = "miniscript")]
 use miniscript::{Descriptor, DescriptorPublicKey};
+use pyo3::prelude::PyAnyMethods;
 
 use crate::error::{Error, ErrorCode};
 
@@ -113,7 +114,7 @@ pub enum HWIAddressType {
 
 impl IntoPy<PyObject> for HWIAddressType {
     fn into_py(self, py: pyo3::Python) -> PyObject {
-        let addrtype = PyModule::import(py, "hwilib.common")
+        let addrtype = PyModule::import_bound(py, "hwilib.common")
             .unwrap()
             .getattr("AddressType")
             .unwrap();
@@ -133,7 +134,7 @@ impl IntoPy<PyObject> for HWIChain {
     fn into_py(self, py: pyo3::Python) -> PyObject {
         use bitcoin::Network::*;
 
-        let chain = PyModule::import(py, "hwilib.common")
+        let chain = PyModule::import_bound(py, "hwilib.common")
             .unwrap()
             .getattr("Chain")
             .unwrap();