diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index fe0a51c..793ce28 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.0.26
+current_version = 0.0.27
 
 [bumpversion:file:mkdocs_mdpo_plugin/__init__.py]
 
diff --git a/mkdocs_mdpo_plugin/__init__.py b/mkdocs_mdpo_plugin/__init__.py
index 90912fd..ff05969 100644
--- a/mkdocs_mdpo_plugin/__init__.py
+++ b/mkdocs_mdpo_plugin/__init__.py
@@ -1,3 +1,3 @@
 """mkdocs-mdpo-plugin package"""
 
-__version__ = '0.0.26'
+__version__ = '0.0.27'
diff --git a/mkdocs_mdpo_plugin/plugin.py b/mkdocs_mdpo_plugin/plugin.py
index 4a57c43..5d47d5e 100644
--- a/mkdocs_mdpo_plugin/plugin.py
+++ b/mkdocs_mdpo_plugin/plugin.py
@@ -461,7 +461,7 @@ def on_page_markdown(self, markdown, page, config, files):
             ][language]
             temp_abs_dirpath = os.path.dirname(temp_abs_path)
             os.makedirs(temp_abs_dirpath, exist_ok=True)
-            with open(temp_abs_path, 'w') as f:
+            with open(temp_abs_path, 'w', encoding='utf-8') as f:
                 f.write(content)
 
             new_file = mkdocs.structure.files.File(
@@ -732,7 +732,7 @@ def on_post_page(self, output, page, config):
             ) + '/'
             self.translations.locations[location] = page.file._mdpo_language
 
-            with open(render_path, 'w') as f:
+            with open(render_path, 'w', encoding='utf-8') as f:
                 f.write(output)
         return output
 
diff --git a/mkdocs_mdpo_plugin/search_indexes.py b/mkdocs_mdpo_plugin/search_indexes.py
index 05a1e61..f659bcc 100644
--- a/mkdocs_mdpo_plugin/search_indexes.py
+++ b/mkdocs_mdpo_plugin/search_indexes.py
@@ -84,7 +84,7 @@ def _material_patch_worker_js_files(files, language):
         '/search/search_index.json',
         f'/search/search_index_{language}.json',
     )
-    with open(new_path, 'w') as f:
+    with open(new_path, 'w', encoding='utf-8') as f:
         f.write(new_content)
 
 
@@ -100,7 +100,7 @@ def _mkdocs_patch_worker_js_files(files, language):
         'search_index.json',
         f'search_index_{language}.json',
     )
-    with open(new_worker_js_path, 'w') as f:
+    with open(new_worker_js_path, 'w', encoding='utf-8') as f:
         f.write(new_worker_js_content)
 
     new_main_js_path = _language_extension_path(
@@ -112,7 +112,7 @@ def _mkdocs_patch_worker_js_files(files, language):
         'worker.js',
         f'worker_{language}.js',
     )
-    with open(new_main_js_path, 'w') as f:
+    with open(new_main_js_path, 'w', encoding='utf-8') as f:
         f.write(new_main_js_content)
 
 
@@ -142,7 +142,7 @@ def _material_patch_html_file(fpath, language, worker_files):
         f'{worker_js_fname}',
         f'{worker_js_fname_lang}',
     )
-    with open(fpath, 'w') as f:
+    with open(fpath, 'w', encoding='utf-8') as f:
         f.write(new_content)
 
 
@@ -154,7 +154,7 @@ def _mkdocs_patch_html_file(fpath, language, *args):
         'search/main.js',
         f'search/main_{language}.js',
     )
-    with open(fpath, 'w') as f:
+    with open(fpath, 'w', encoding='utf-8') as f:
         f.write(new_content)
 
 
@@ -206,7 +206,7 @@ def _reathedocs_patch_search_files(
         f'search/main_{default_language}.js',
         f'search/main_{language}.js',
     )
-    with open(lang_search_path, 'w') as f:
+    with open(lang_search_path, 'w', encoding='utf-8') as f:
         f.write(lang_search_path_content)
 
     # patch search file URL in language file
@@ -216,7 +216,7 @@ def _reathedocs_patch_search_files(
         'search.html',
         f'search_{language}.html',
     )
-    with open(fpath, 'w') as f:
+    with open(fpath, 'w', encoding='utf-8') as f:
         f.write(new_content)
 
 
@@ -369,7 +369,7 @@ def _create_lang_search_index_json(self, language, records):
             language,
         )
         with open(new_path, 'w') as f:
-            f.write(json.dumps(search_index))
+            json.dump(search_index, f)
 
     def _get_html_files_by_language(self):
         language_files = {language: [] for language in self.languages}
diff --git a/setup.cfg b/setup.cfg
index 4ec3714..c0f5dbb 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = mkdocs_mdpo_plugin
-version = 0.0.26
+version = 0.0.27
 description = Mkdocs plugin for translations using PO files.
 long_description = file: README.md
 long_description_content_type = text/markdown