diff --git a/docs/conf.py b/docs/conf.py
index 9666074..79ae4bc 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -3,17 +3,17 @@
 See: https://www.sphinx-doc.org/en/master/usage/configuration.html
 """
 
-import os
 import sys
 from datetime import date
+from pathlib import Path
 
 from intersphinx_registry import get_intersphinx_mapping
 
 import pybv
 
-curdir = os.path.dirname(__file__)
-sys.path.append(os.path.abspath(os.path.join(curdir, "..", "pybv")))
-sys.path.append(os.path.abspath(os.path.join(curdir, "sphinxext")))
+curdir = Path(__file__).parent
+sys.path.append((curdir / ".." / "pybv").resolve())
+sys.path.append((curdir / ".." / "sphinxext").resolve())
 
 # see: https://sphinx.readthedocs.io/en/1.3/extensions.html
 extensions = [
diff --git a/pybv/io.py b/pybv/io.py
index 46a5f41..d7a5295 100644
--- a/pybv/io.py
+++ b/pybv/io.py
@@ -5,7 +5,7 @@
 import os
 import shutil
 import sys
-from os import path as op
+from pathlib import Path
 from warnings import warn
 
 import numpy as np
@@ -63,7 +63,7 @@ def write_brainvision(
     fname_base : str
         The base name for the output files. Three files will be created (*.vhdr*,
         *.vmrk*, *.eeg*), and all will share this base name.
-    folder_out : str
+    folder_out : str | pathlib.Path
         The folder where output files will be saved. Will be created if it does not
         exist.
     overwrite : bool
@@ -182,6 +182,8 @@ def write_brainvision(
 
     """
     # input checks
+    folder_out = Path(folder_out)
+
     if not isinstance(data, np.ndarray):
         raise ValueError(f"data must be np.ndarray, but found: {type(data)}")
 
@@ -299,13 +301,13 @@ def write_brainvision(
         )
 
     # create output file names/paths, checking if they already exist
-    folder_out_created = not op.exists(folder_out)
-    os.makedirs(folder_out, exist_ok=True)
-    eeg_fname = op.join(folder_out, fname_base + ".eeg")
-    vmrk_fname = op.join(folder_out, fname_base + ".vmrk")
-    vhdr_fname = op.join(folder_out, fname_base + ".vhdr")
+    folder_out_created = not folder_out.exists()
+    folder_out.mkdir(parents=True, exist_ok=True)
+    eeg_fname = folder_out / f"{fname_base}.eeg"
+    vmrk_fname = folder_out / f"{fname_base}.vmrk"
+    vhdr_fname = folder_out / f"{fname_base}.vhdr"
     for fname in (eeg_fname, vmrk_fname, vhdr_fname):
-        if op.exists(fname) and not overwrite:
+        if fname.exists() and not overwrite:
             raise OSError(
                 f"File already exists: {fname}.\n" f"Consider setting overwrite=True."
             )
@@ -341,7 +343,7 @@ def write_brainvision(
         else:
             # else, only remove the files we might have created
             for fname in (eeg_fname, vmrk_fname, vhdr_fname):
-                if op.exists(fname):  # pragma: no cover
+                if fname.exists():  # pragma: no cover
                     os.remove(fname)
 
         raise
@@ -703,8 +705,8 @@ def _write_vhdr_file(
         print("", file=fout)
         print("[Common Infos]", file=fout)
         print("Codepage=UTF-8", file=fout)
-        print(f"DataFile={op.basename(eeg_fname)}", file=fout)
-        print(f"MarkerFile={op.basename(vmrk_fname)}", file=fout)
+        print(f"DataFile={eeg_fname.name}", file=fout)
+        print(f"MarkerFile={vmrk_fname.name}", file=fout)
 
         if format.startswith("binary"):
             print("DataFormat=BINARY", file=fout)
diff --git a/pybv/tests/test_write_brainvision.py b/pybv/tests/test_write_brainvision.py
index 3470fba..cd93fc6 100644
--- a/pybv/tests/test_write_brainvision.py
+++ b/pybv/tests/test_write_brainvision.py
@@ -2,7 +2,6 @@
 
 import itertools
 import os
-import os.path as op
 import re
 from datetime import datetime, timezone
 
@@ -705,10 +704,10 @@ def test_cleanup(tmpdir):
             folder_out=folder_out,
             fmt="binary_float999",
         )
-    assert not op.exists(folder_out)
-    assert not op.exists(folder_out / fname + ".eeg")
-    assert not op.exists(folder_out / fname + ".vmrk")
-    assert not op.exists(folder_out / fname + ".vhdr")
+    assert not (folder_out).exists()
+    assert not (folder_out / fname + ".eeg").exists()
+    assert not (folder_out / fname + ".vmrk").exists()
+    assert not (folder_out / fname + ".vhdr").exists()
 
     # if folder already existed before erroneous writing, it is not deleted
     os.makedirs(folder_out)
@@ -721,12 +720,12 @@ def test_cleanup(tmpdir):
             folder_out=folder_out,
             fmt="binary_float999",
         )
-    assert op.exists(folder_out)
+    assert folder_out.exists()
 
     # but all other (incomplete/erroneous) files are deleted
-    assert not op.exists(folder_out / fname + ".eeg")
-    assert not op.exists(folder_out / fname + ".vmrk")
-    assert not op.exists(folder_out / fname + ".vhdr")
+    assert not (folder_out / fname + ".eeg").exists()
+    assert not (folder_out / fname + ".vmrk").exists()
+    assert not (folder_out / fname + ".vhdr").exists()
 
 
 def test_overwrite(tmpdir):