diff --git a/README.md b/README.md
index 5f5279b..57d9c90 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,8 @@ The extension ships with `ruff==0.16.0`.
 ## Usage
 
 Once installed in Visual Studio Code, `ruff` will automatically execute when you open or edit a
-Python or Jupyter Notebook file.
+Python or Jupyter Notebook file, or a Ruff configuration file (`pyproject.toml`, `ruff.toml`, or
+`.ruff.toml`).
 
 If you want to disable Ruff, you can [disable this extension](https://code.visualstudio.com/docs/editor/extension-marketplace#_disable-an-extension)
 per workspace in Visual Studio Code.
diff --git a/package.json b/package.json
index 1852356..8ce815e 100644
--- a/package.json
+++ b/package.json
@@ -59,7 +59,10 @@
     "onLanguage:markdown",
     "workspaceContains:*.py",
     "workspaceContains:*.ipynb",
-    "workspaceContains:*.md"
+    "workspaceContains:*.md",
+    "workspaceContains:**/pyproject.toml",
+    "workspaceContains:**/ruff.toml",
+    "workspaceContains:**/.ruff.toml"
   ],
   "main": "./dist/extension.js",
   "scripts": {
diff --git a/src/common/utilities.ts b/src/common/utilities.ts
index 43ca292..e93d8d4 100644
--- a/src/common/utilities.ts
+++ b/src/common/utilities.ts
@@ -45,5 +45,6 @@ export function getDocumentSelector(): DocumentSelector {
         { scheme: "vscode-notebook-cell", language: "python" },
         { scheme: "file", language: "markdown" },
         { scheme: "untitled", language: "markdown" },
+        { scheme: "file", pattern: "**/{pyproject.toml,ruff.toml,.ruff.toml}" },
       ];
 }