diff --git a/.flake8 b/.flake8
index c01b6312..b755cb6a 100644
--- a/.flake8
+++ b/.flake8
@@ -1,4 +1,4 @@
 [flake8]
 max-line-length = 120
-ignore = D100,D101,D102,F811,E722,F821
+ignore = D100,D101,D102,F811,E722,F821,W503
 exclude = .git,__pycache__,.idea,messages,screenshots
diff --git a/JsPrettier.py b/JsPrettier.py
index 2733f7c4..8bc1f282 100644
--- a/JsPrettier.py
+++ b/JsPrettier.py
@@ -689,9 +689,14 @@ def is_typescript(view):
         if not filename:
             return False
         scopename = view.scope_name(0)
-        if scopename.startswith('source.ts') or filename.endswith('.ts'):
-            return True
-        if scopename.startswith('source.tsx') or filename.endswith('.tsx'):
+        if (
+            scopename.startswith("source.ts")
+            or scopename.startswith("source.tsx")
+            or filename.endswith(".ts")
+            or filename.endswith(".tsx")
+            or filename.endswith(".cts")
+            or filename.endswith(".mts")
+        ):
             return True
         return False
 
@@ -701,7 +706,12 @@ def is_json(view):
         if not filename:
             return False
         scopename = view.scope_name(0)
-        if scopename.startswith('source.json') or filename.endswith('.json'):
+        if (
+            scopename.startswith("source.json")
+            or filename.endswith(".json")
+            or filename.endswith(".jsonc")
+            or filename.endswith(".json5")
+        ):
             return True
         return False
 
@@ -772,7 +782,11 @@ def is_yaml(view):
         if not filename:
             return False
         scopename = view.scope_name(0)
-        if scopename.startswith('source.yaml') or filename.endswith('.yml'):
+        if (
+            scopename.startswith("source.yaml")
+            or filename.endswith(".yml")
+            or filename.endswith(".yaml")
+        ):
             return True
         return False
 
diff --git a/JsPrettier.sublime-settings b/JsPrettier.sublime-settings
index 590e9cdb..162a950c 100644
--- a/JsPrettier.sublime-settings
+++ b/JsPrettier.sublime-settings
@@ -160,9 +160,10 @@
 	//
 	// Additional custom file extensions to format.
 	//
-	// There's built-in support already for "js", "jsx", "mjs", "json", "html",
-	// "graphql/gql", "ts", "tsx", "css", "scss", "less", "md", "mdx", "yml"
-	// and "vue" and "component.html" (angular html) files.
+	// There's built-in support already for "js", "jsx", "cjs", "mjs", "json",
+	// "jsonc", "json5", "html", "graphql/gql", "ts", "tsx", "cts", "mts", "css",
+	// "scss", "less", "md", "mdx", "yml", "yaml" and "vue" and "component.html"
+	// (angular html) files.
 	//
 	// Additional file extensions MUST be specified here, and without the leading dot.
 	// ----------------------------------------------------------------------
diff --git a/README.md b/README.md
index dc904c38..757575ef 100644
--- a/README.md
+++ b/README.md
@@ -237,9 +237,10 @@ application menu to:
     Text syntaxes.
 
 - **custom_file_extensions** (default: [])  
-    There's built-in support already for `js`, `jsx`, `mjs`, `json`, `html`,
-    `graphql/gql`, `ts`, `tsx`, `css`, `scss`, `less`, `md`, `mdx`, `yml`,
-    `vue` and `component.html` (angular html) files.
+    There's built-in support already for `js`, `jsx`, `cjs`, `mjs`, `json`,
+    `jsonc`, `json5`, `html`, `graphql/gql`, `ts`, `tsx`, `cts`, `mts`, `css`,
+    `scss`, `less`, `md`, `mdx`, `yml`, `yaml`, `vue` and `component.html`
+    (angular html) files.
 
     Put additional file extensions here, and be sure not to include the
     leading dot in the file extension.
diff --git a/jsprettier/const.py b/jsprettier/const.py
index 895526fa..ba930eac 100644
--- a/jsprettier/const.py
+++ b/jsprettier/const.py
@@ -138,6 +138,8 @@
     'js',
     'jsx',
     'json',
+    'jsonc',
+    'json5',
     'graphql',
     'gql',
     'html',
@@ -149,6 +151,10 @@
     'md',
     'vue',
     'yml',
+    'yaml',
+    'cjs',
     'mjs',
-    'mdx'
+    'mdx',
+    'cts',
+    'mts'
 ]