diff --git a/.github/FUNDING.yml b/.github/FUNDING.yaml
similarity index 100%
rename from .github/FUNDING.yml
rename to .github/FUNDING.yaml
diff --git a/.github/workflows/check.yml b/.github/workflows/check.yaml
similarity index 100%
rename from .github/workflows/check.yml
rename to .github/workflows/check.yaml
diff --git a/.github/workflows/pages.yml b/.github/workflows/pages.yaml
similarity index 100%
rename from .github/workflows/pages.yml
rename to .github/workflows/pages.yaml
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yaml
similarity index 100%
rename from .github/workflows/release.yml
rename to .github/workflows/release.yaml
diff --git a/assets/dump-configs.yml b/assets/dump-configs.yaml
similarity index 100%
rename from assets/dump-configs.yml
rename to assets/dump-configs.yaml
diff --git a/assets/fallback-configs.yml b/assets/fallback-configs.yaml
similarity index 100%
rename from assets/fallback-configs.yml
rename to assets/fallback-configs.yaml
diff --git a/assets/patch-glyphs/10/config.yml b/assets/patch-glyphs/10/config.yaml
similarity index 100%
rename from assets/patch-glyphs/10/config.yml
rename to assets/patch-glyphs/10/config.yaml
diff --git a/assets/patch-glyphs/12/config.yml b/assets/patch-glyphs/12/config.yaml
similarity index 100%
rename from assets/patch-glyphs/12/config.yml
rename to assets/patch-glyphs/12/config.yaml
diff --git a/assets/patch-glyphs/8/config.yml b/assets/patch-glyphs/8/config.yaml
similarity index 100%
rename from assets/patch-glyphs/8/config.yml
rename to assets/patch-glyphs/8/config.yaml
diff --git a/assets/update-configs.yml b/assets/update-configs.yaml
similarity index 100%
rename from assets/update-configs.yml
rename to assets/update-configs.yaml
diff --git a/tools/configs/__init__.py b/tools/configs/__init__.py
index 9e00d44..10a445b 100644
--- a/tools/configs/__init__.py
+++ b/tools/configs/__init__.py
@@ -47,9 +47,9 @@
 attachments = list[Attachment](get_args(Attachment.__value__))
 
 mapping_file_paths = [
-    path_define.ark_pixel_mappings_dir.joinpath('2700-27BF Dingbats.yml'),
-    path_define.ark_pixel_mappings_dir.joinpath('2E80-2EFF CJK Radicals Supplement.yml'),
-    path_define.ark_pixel_mappings_dir.joinpath('2F00-2FDF Kangxi Radicals.yml'),
+    path_define.ark_pixel_mappings_dir.joinpath('2700-27BF Dingbats.yaml'),
+    path_define.ark_pixel_mappings_dir.joinpath('2E80-2EFF CJK Radicals Supplement.yaml'),
+    path_define.ark_pixel_mappings_dir.joinpath('2F00-2FDF Kangxi Radicals.yaml'),
 ]
 
 license_configs = {
diff --git a/tools/configs/dump.py b/tools/configs/dump.py
index cf5d73d..076cbd9 100644
--- a/tools/configs/dump.py
+++ b/tools/configs/dump.py
@@ -10,7 +10,7 @@
 class DumpConfig:
     @staticmethod
     def load() -> dict[FontSize, list['DumpConfig']]:
-        configs_data = yaml.safe_load(path_define.assets_dir.joinpath('dump-configs.yml').read_bytes())
+        configs_data = yaml.safe_load(path_define.assets_dir.joinpath('dump-configs.yaml').read_bytes())
         dump_configs = {font_size: [] for font_size in configs.font_sizes}
         for name, items_data in configs_data.items():
             version = json.loads(path_define.fonts_dir.joinpath(name, 'version.json').read_bytes())['version']
diff --git a/tools/configs/fallback.py b/tools/configs/fallback.py
index 39e88be..947ff2b 100644
--- a/tools/configs/fallback.py
+++ b/tools/configs/fallback.py
@@ -9,7 +9,7 @@
 class FallbackConfig:
     @staticmethod
     def load() -> dict[FontSize, list['FallbackConfig']]:
-        configs_data = yaml.safe_load(path_define.assets_dir.joinpath('fallback-configs.yml').read_bytes())
+        configs_data = yaml.safe_load(path_define.assets_dir.joinpath('fallback-configs.yaml').read_bytes())
         fallback_configs = {font_size: [] for font_size in configs.font_sizes}
         for config_data in configs_data:
             font_size = config_data['font-size']
diff --git a/tools/configs/font.py b/tools/configs/font.py
index cd37bfd..c05e1c9 100644
--- a/tools/configs/font.py
+++ b/tools/configs/font.py
@@ -23,7 +23,7 @@ def line_height(self) -> int:
 class FontConfig:
     @staticmethod
     def load(font_size: FontSize) -> 'FontConfig':
-        file_path = path_define.patch_glyphs_dir.joinpath(str(font_size), 'config.yml')
+        file_path = path_define.patch_glyphs_dir.joinpath(str(font_size), 'config.yaml')
         config_data = yaml.safe_load(file_path.read_bytes())
 
         layout_params = {}
diff --git a/tools/configs/update.py b/tools/configs/update.py
index 11c6438..da56431 100644
--- a/tools/configs/update.py
+++ b/tools/configs/update.py
@@ -15,7 +15,7 @@ def __init__(self, file_name: str | None, copy_list: list[tuple[str, str]]):
 class UpdateConfig:
     @staticmethod
     def load() -> list['UpdateConfig']:
-        configs_data = yaml.safe_load(path_define.assets_dir.joinpath('update-configs.yml').read_bytes())
+        configs_data = yaml.safe_load(path_define.assets_dir.joinpath('update-configs.yaml').read_bytes())
         update_configs = []
         for config_data in configs_data:
             name = config_data['name']
diff --git a/tools/services/update_service.py b/tools/services/update_service.py
index 8b9d464..3380e3e 100644
--- a/tools/services/update_service.py
+++ b/tools/services/update_service.py
@@ -78,7 +78,7 @@ def setup_ark_pixel_glyphs():
     if path_define.ark_pixel_mappings_dir.exists():
         shutil.rmtree(path_define.ark_pixel_mappings_dir)
     for font_size in [10, 12]:
-        shutil.copyfile(source_unzip_dir.joinpath('assets', 'glyphs', str(font_size), 'config.yml'), path_define.patch_glyphs_dir.joinpath(str(font_size), 'config.yml'))
+        shutil.copyfile(source_unzip_dir.joinpath('assets', 'glyphs', str(font_size), 'config.yaml'), path_define.patch_glyphs_dir.joinpath(str(font_size), 'config.yaml'))
     shutil.copyfile(source_unzip_dir.joinpath('LICENSE-OFL'), font_ark_pixel_dir.joinpath('LICENSE.txt'))
     source_unzip_dir.joinpath('assets', 'glyphs').rename(path_define.ark_pixel_glyphs_dir)
     source_unzip_dir.joinpath('assets', 'mappings').rename(path_define.ark_pixel_mappings_dir)