diff --git a/serialize/all.py b/serialize/all.py
index b10c87b..9798946 100644
--- a/serialize/all.py
+++ b/serialize/all.py
@@ -12,7 +12,7 @@
 
 from collections import namedtuple
 from io import BytesIO
-from os.path import splitext
+from pathlib import Path
 
 #: Stores the functions to convert custom classes to and from builtin types.
 ClassHelper = namedtuple('ClassHelper', 'to_builtin from_builtin')
@@ -293,21 +293,23 @@ def dumps(obj, fmt):
     return _get_format(fmt).dumps(obj)
 
 
-def dump(obj, filename_or_file, fmt=None):
+def dump(obj, file, fmt=None):
     """Serialize `obj` to a file using the format specified by `fmt`
 
     The file can be specified by a file-like object or filename.
     In the latter case the fmt is not need if it can be guessed from the extension.
     """
+    if isinstance(file, str):
+        file = Path(file)
 
-    if isinstance(filename_or_file, str):
+    if isinstance(file, Path):
         if fmt is None:
-            _, ext = splitext(filename_or_file)
-            fmt = _get_format_from_ext(ext.strip('.'))
-        with open(filename_or_file, 'wb') as fp:
+            fmt = _get_format_from_ext(file.suffix.lstrip('.'))
+
+        with open(file, 'wb') as fp:
             dump(obj, fp, fmt)
     else:
-        _get_format(fmt).dump(obj, filename_or_file)
+        _get_format(fmt).dump(obj, file)
 
 
 def loads(serialized, fmt):
@@ -317,21 +319,23 @@ def loads(serialized, fmt):
     return _get_format(fmt).loads(serialized)
 
 
-def load(filename_or_file, fmt=None):
+def load(file, fmt=None):
     """Deserialize from a file using the format specified by `fmt`
 
     The file can be specified by a file-like object or filename.
     In the latter case the fmt is not need if it can be guessed from the extension.
     """
+    if isinstance(file, str):
+        file = Path(file)
 
-    if isinstance(filename_or_file, str):
+    if isinstance(file, Path):
         if fmt is None:
-            _, ext = splitext(filename_or_file)
-            fmt = _get_format_from_ext(ext.strip('.'))
-        with open(filename_or_file, 'rb') as fp:
-            return load(fp, fmt)
+            fmt = _get_format_from_ext(file.suffix.lstrip('.'))
 
-    return _get_format(fmt).load(filename_or_file)
+        with open(file, 'rb') as fp:
+            return load(fp, fmt)
+    else:
+        return _get_format(fmt).load(file)
 
 
 def register_class(klass, to_builtin, from_builtin):
diff --git a/serialize/testsuite/test_basic.py b/serialize/testsuite/test_basic.py
index 0b65420..9411768 100644
--- a/serialize/testsuite/test_basic.py
+++ b/serialize/testsuite/test_basic.py
@@ -1,6 +1,7 @@
 
 import io
 import os
+from pathlib import Path
 from unittest import TestCase, skipIf
 
 from serialize import register_class, loads, dumps, load, dump
@@ -123,6 +124,14 @@ def test_file_by_name(self):
         finally:
             os.remove(filename2)
 
+        filename3 = Path("tmp." + fh.extension)
+        dump(obj, filename3)
+        try:
+            obj1 = load(filename3)
+            self.assertEqual(obj, obj1)
+        finally:
+            os.remove(filename3)
+
     def test_format_from_ext(self):
         if ':' in self.FMT:
             return