diff --git a/software/pio_hooks.py b/software/pio_hooks.py
index 55bdd2381..964691578 100644
--- a/software/pio_hooks.py
+++ b/software/pio_hooks.py
@@ -14,7 +14,7 @@
 import re
 import json
 import glob
-from pathlib import PurePath
+import pathlib
 from base64 import b64encode
 from zlib import crc32
 from collections import namedtuple
@@ -33,7 +33,7 @@ def check_call(*args, **kwargs):
         sys.exit(1)
 
 def get_changelog_version(name):
-    path = os.path.join('changelog_{}.txt'.format(name))
+    path = f'changelog_{name}.txt'
     versions = []
 
     with open(path, 'r', encoding='utf-8') as f:
@@ -102,8 +102,7 @@ def write_firmware_info(display_name, major, minor, patch, beta, build_time):
     buf[76] = int(beta) # since version 2
     buf[4092:4096] = crc32(buf[0:4092]).to_bytes(4, byteorder='little')
 
-    with open(os.path.join(env.subst("$BUILD_DIR"), "firmware_info.bin"), "wb") as f:
-        f.write(buf)
+    pathlib.Path(env.subst('$BUILD_DIR'), 'firmware_info.bin').write_bytes(buf)
 
 def generate_module_dependencies(info_path, module, modules, all_modules_upper):
     if module:
@@ -800,7 +799,7 @@ def main():
         backend_modules.append(util.FlavoredName("Debug").get())
 
     with tfutil.ChangedDirectory('src'):
-        excluded_bindings = [PurePath(x).as_posix() for x in glob.glob('bindings/brick_*') + glob.glob('bindings/bricklet_*')]
+        excluded_bindings = [pathlib.PurePath(x).as_posix() for x in glob.glob('bindings/brick_*') + glob.glob('bindings/bricklet_*')]
 
     excluded_bindings.remove('bindings/bricklet_unknown.h')
     excluded_bindings.remove('bindings/bricklet_unknown.c')
@@ -849,10 +848,10 @@ def include_bindings(path):
                 check_call([env.subst('$PYTHONEXE'), "-u", "prepare.py"], env=environ)
 
     for root, dirs, files in os.walk('src', followlinks=True):
-        root_path = PurePath(root)
+        root_path = pathlib.PurePath(root)
         root_parents = [root_path] + list(root_path.parents)
 
-        if PurePath('src', 'bindings') in root_parents or PurePath('src', 'modules') in root_parents:
+        if pathlib.PurePath('src', 'bindings') in root_parents or pathlib.PurePath('src', 'modules') in root_parents:
             continue
 
         for name in files:
diff --git a/software/web/build.py b/software/web/build.py
index 412a2ae79..f48756b40 100644
--- a/software/web/build.py
+++ b/software/web/build.py
@@ -13,7 +13,7 @@
 
 JS_ANALYZE = False
 
-BUILD_DIR = '../build'
+BUILD_DIR = pathlib.Path('..', 'build')
 
 HTML_MINIFIER_TERSER_OPTIONS = [
     '--collapse-boolean-attributes',
@@ -68,17 +68,17 @@ def main():
                     print(f'Error: {e}', file=sys.stderr)
                     exit(42)
             else:
-                os.makedirs(os.path.split(src_tfpp_path)[0], exist_ok=True)
+                src_tfpp_path.parent.mkdir(parents=True, exist_ok=True)
                 shutil.copy2(src_path, src_tfpp_path)
 
     os.chdir('src_tfpp')
 
     try:
-        shutil.rmtree(BUILD_DIR)
+        shutil.rmtree(str(BUILD_DIR))
     except FileNotFoundError:
         pass
 
-    os.makedirs(BUILD_DIR)
+    BUILD_DIR.mkdir(parents=True)
 
     print('tsc...')
     subprocess.check_call([
@@ -93,12 +93,12 @@ def main():
         'npx',
         'esbuild',
         'main.tsx',
-        '--metafile={}'.format(os.path.join(BUILD_DIR, 'meta.json')),
+        f'--metafile={BUILD_DIR / "meta.json"}',
         '--bundle',
         '--target=es6',
         '--alias:argon2-browser=../node_modules/argon2-browser/dist/argon2-bundled.min.js',
         '--alias:jquery=../node_modules/jquery/dist/jquery.slim.min',
-        '--outfile={0}'.format(os.path.join(BUILD_DIR, 'bundle.min.js'))
+        f'--outfile={BUILD_DIR / "bundle.min.js"}'
     ]
 
     if JS_ANALYZE:
@@ -123,7 +123,7 @@ def main():
 
     scss_args += [
         'main.scss',
-        os.path.join(BUILD_DIR, 'main.css')
+        str(BUILD_DIR / 'main.css')
     ]
 
     subprocess.check_call(scss_args, shell=sys.platform == 'win32')
@@ -132,24 +132,20 @@ def main():
     subprocess.check_call([
         'npx',
         'postcss',
-        os.path.join(BUILD_DIR, 'main.css'),
+        str(BUILD_DIR / 'main.css'),
         '-o',
-        os.path.join(BUILD_DIR, 'main.min.css')
+        str(BUILD_DIR / 'main.min.css')
     ], shell=sys.platform == 'win32')
 
     if args.css_source_map:
-        with open(os.path.join(BUILD_DIR, 'main.min.css'), 'r', encoding='utf-8') as f:
-            css_src = f.read()
+        css_src = (BUILD_DIR / 'main.min.css').read_text(encoding='utf-8')
+        css_map = b64encode((BUILD_DIR / 'main.min.css.map').read_bytes()).decode('ascii')
 
-        with open(os.path.join(BUILD_DIR, 'main.min.css.map'), 'rb') as f:
-            css_map = b64encode(f.read()).decode('ascii')
+        (BUILD_DIR / 'main.min.css.map').unlink()
 
-        os.remove(os.path.join(BUILD_DIR, 'main.min.css.map'))
+        css_src = css_src.replace('sourceMappingURL=main.min.css.map', f'sourceMappingURL=data:text/json;base64,{css_map}')
 
-        css_src = css_src.replace('sourceMappingURL=main.min.css.map', 'sourceMappingURL=data:text/json;base64,{0}'.format(css_map))
-
-        with open(os.path.join(BUILD_DIR, 'main.min.css'), 'w', encoding='utf-8') as f:
-            f.write(css_src)
+        (BUILD_DIR / 'main.min.css').write_text(css_src, encoding='utf-8')
 
     print('html-minifier-terser...')
     subprocess.check_call([
@@ -157,7 +153,7 @@ def main():
         'html-minifier-terser'] +
         HTML_MINIFIER_TERSER_OPTIONS + [
         '-o',
-        os.path.join(BUILD_DIR, 'index.min.html'),
+        str(BUILD_DIR / 'index.min.html'),
         'index.html'
     ], shell=sys.platform == 'win32')