diff --git a/config_converter/converters/toml_converter.py b/config_converter/converters/toml_converter.py
index e5846a9..9b3073f 100644
--- a/config_converter/converters/toml_converter.py
+++ b/config_converter/converters/toml_converter.py
@@ -1,9 +1,10 @@
 """TOML format converter."""
 
 from pathlib import Path
-from typing import Any, Dict
+from typing import Any, Dict, Union
 
 import tomlkit
+import tomlkit.exceptions
 from tomlkit import TOMLDocument
 
 from config_converter.converters.base import BaseConverter, ConversionError
@@ -15,7 +16,7 @@ class TomlConverter(BaseConverter):
     FORMAT_NAME = "toml"
     FILE_EXTENSIONS = ["toml"]
 
-    def read(self, source: str | Path) -> Dict[str, Any]:
+    def read(self, source: Union[str, Path]) -> Dict[str, Any]:
         """Read and parse a TOML configuration file."""
         try:
             with open(source, "r", encoding="utf-8") as f:
@@ -27,7 +28,7 @@ class TomlConverter(BaseConverter):
         except PermissionError as e:
             raise ConversionError(f"Permission denied: {source}") from e
 
-    def write(self, data: Dict[str, Any], target: str | Path) -> None:
+    def write(self, data: Dict[str, Any], target: Union[str, Path]) -> None:
         """Write configuration data to a TOML file."""
         try:
             doc: TOMLDocument = tomlkit.document()
@@ -35,7 +36,7 @@ class TomlConverter(BaseConverter):
                 doc[key] = value
             with open(target, "w", encoding="utf-8") as f:
                 f.write(tomlkit.dumps(doc))
-        except (OSError, TypeError, tomlkit.exceptions.TypeError) as e:
+        except (OSError, TypeError) as e:
             raise ConversionError(f"Failed to write TOML to {target}: {e}") from e
 
     def parse(self, content: str) -> Dict[str, Any]:
@@ -52,5 +53,5 @@ class TomlConverter(BaseConverter):
             for key, value in data.items():
                 doc[key] = value
             return tomlkit.dumps(doc)
-        except (TypeError, ValueError, tomlkit.exceptions.TypeError) as e:
+        except (TypeError, ValueError) as e:
             raise ConversionError(f"Failed to format data as TOML: {e}") from e