diff --git a/lib/index.js b/lib/index.js
index abd894d..758d299 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -24,6 +24,7 @@ module.exports = function setupHook({
   devMode,
   extensions = '.css',
   ignore,
+  only,
   preprocessCss = identity,
   processCss,
   processorOpts,
@@ -122,7 +123,7 @@ module.exports = function setupHook({
   };
 
   const exts = toArray(extensions);
-  const isException = buildExceptionChecker(ignore);
+  const isException = buildExceptionChecker(ignore, only);
 
   // @todo add possibility to specify particular config for each extension
   exts.forEach(extension => attachHook(filename => fetch(filename, filename), extension, isException));
@@ -142,14 +143,25 @@ function toArray(option) {
  * @param  {function|regex|string} ignore glob, regex or function
  * @return {function}
  */
-function buildExceptionChecker(ignore) {
-  if (ignore instanceof RegExp) {
-    return filepath => ignore.test(filepath);
+function buildExceptionChecker(ignore, only) {
+  const param = ignore || only;
+  let fn;
+
+  if (!ignore && !only) {
+    return negate(identity);
+  }
+
+  if (param instanceof RegExp) {
+    fn = filepath => param.test(filepath);
+  } else if (typeof param === 'string') {
+    fn = filepath => globToRegex(param).test(filepath);
+  } else {
+    fn = param;
   }
 
-  if (typeof ignore === 'string') {
-    return filepath => globToRegex(ignore).test(filepath);
+  if (only) {
+    fn = negate(fn);
   }
 
-  return ignore || negate(identity);
+  return fn;
 }
diff --git a/lib/validate.js b/lib/validate.js
index 9ddc925..01e51d3 100644
--- a/lib/validate.js
+++ b/lib/validate.js
@@ -7,6 +7,7 @@ const rules = {
   devMode:            'boolean',
   extensions:         'array|string',
   ignore:             'function|regex|string',
+  only:               'function|regex|string',
   preprocessCss:      'function',
   processCss:         'function',
   processorOpts:      'object',
diff --git a/test/api/only.js b/test/api/only.js
new file mode 100644
index 0000000..24df8c1
--- /dev/null
+++ b/test/api/only.js
@@ -0,0 +1,53 @@
+const detachHook = require('../sugar').detachHook;
+const dropCache = require('../sugar').dropCache;
+
+suite('api/only', () => {
+  suite('glob', () => {
+    setup(() => hook({
+      only: '*typography*',
+    }));
+
+    test('should return tokens', () => {
+      assert.deepEqual(require('./fixture/typography.css'), {
+        common: '_test_api_fixture_typography__common',
+      });
+    });
+
+    test('should throw an exception', () => {
+      assert.throws(() => require('./fixture/oceanic.css'));
+    });
+  });
+
+  suite('function', () => {
+    setup(() => hook({
+      only: filename => !/typography/.test(filename),
+    }));
+
+    test('should return tokens', () => {
+      assert.throws(() => require('./fixture/typography.css'));
+    });
+
+    test('should throw an exception', () => {
+      assert.deepEqual(require('./fixture/oceanic.css'), {
+        color: '_test_api_fixture_oceanic__color',
+      });
+    });
+  });
+
+  suite('regex', () => {
+    setup(() => hook({
+      only: /\.(?!css$)/,
+    }));
+
+    test('should throw an exception', () => {
+      assert.throws(() => require('./fixture/typography.css'));
+      assert.throws(() => require('./fixture/oceanic.css'));
+    });
+  });
+
+  teardown(() => {
+    detachHook('.css');
+    dropCache('./api/fixture/oceanic.css');
+    dropCache('./api/fixture/typography.css');
+  });
+});