diff --git a/python-pyo3/pyproject.toml b/python-pyo3/pyproject.toml
index c2508a90..e0ff9397 100644
--- a/python-pyo3/pyproject.toml
+++ b/python-pyo3/pyproject.toml
@@ -30,8 +30,8 @@ classifiers = [
 dependencies = []
 
 [project.optional-dependencies]
-build = ["maturin", "twine", "wheel"]
-dev = ["ruff"]
+build = ["maturin", "wheel"]
+dev = ["maturin", "ruff"]
 
 [project.urls]
 Repository = "https://github.com/NitorCreations/vault"
diff --git a/python-pyo3/python/n_vault/vault.py b/python-pyo3/python/n_vault/vault.py
index 6a3ce09b..f2cad208 100644
--- a/python-pyo3/python/n_vault/vault.py
+++ b/python-pyo3/python/n_vault/vault.py
@@ -16,7 +16,7 @@
 
 from collections.abc import Collection
 from dataclasses import dataclass
-from typing import Optional
+from typing import Optional, Union
 
 from n_vault import nitor_vault_rs
 
@@ -128,7 +128,7 @@ def direct_decrypt(self, data: bytes) -> bytes:
             profile=self.profile,
         )
 
-    def direct_encrypt(self, data: bytes | str) -> bytes:
+    def direct_encrypt(self, data: Union[bytes, str]) -> bytes:
         """
         Encrypt data with KMS.
         """
@@ -161,7 +161,7 @@ def exists(self, name: str) -> bool:
             profile=self.profile,
         )
 
-    def init(self) -> StackCreated | CloudFormationStackData:
+    def init(self) -> Union[StackCreated, CloudFormationStackData]:
         """
         Initialize new Vault stack.
 
@@ -230,7 +230,7 @@ def stack_status(self) -> CloudFormationStackData:
         )
         return CloudFormationStackData(**data)
 
-    def store(self, name: str, data: bytes | str) -> None:
+    def store(self, name: str, data: Union[bytes, str]) -> None:
         """
         Store encrypted value with given key name in S3.
         """
@@ -248,7 +248,7 @@ def store(self, name: str, data: bytes | str) -> None:
             profile=self.profile,
         )
 
-    def update(self) -> StackUpdated | CloudFormationStackData:
+    def update(self) -> Union[StackUpdated, CloudFormationStackData]:
         """
         Update the vault Cloudformation stack with the current template.