diff --git a/fixtures/edge_case_dots.tar.gz b/fixtures/edge_case_dots.tar.gz
new file mode 100644
index 0000000..c514580
Binary files /dev/null and b/fixtures/edge_case_dots.tar.gz differ
diff --git a/index.js b/index.js
index ba3ec6a..19bc34f 100644
--- a/index.js
+++ b/index.js
@@ -43,7 +43,7 @@ const extractFile = (input, output, opts) => runPlugins(input, opts).then(files
 
 	return Promise.all(files.map(x => {
 		const dest = path.join(output, x.path);
-		if (dest.match(/\.\./)) {
+		if (dest.match(/\.\.\//)) {
 			throw (new Error('File path contains "..":', dest));
 		}
 
diff --git a/test.js b/test.js
index 04bcc28..19f5665 100644
--- a/test.js
+++ b/test.js
@@ -109,3 +109,9 @@ test('throw when a location outside the root is given', async t => {
 		await m(path.join(__dirname, 'fixtures', 'slipping.tar.gz'), 'dist');
 	}, {message: /File path contains "\.\."/});
 });
+
+test('allows filenames to be written with dots in them', async t => {
+	const files = await m(path.join(__dirname, 'fixtures', 'edge_case_dots.tar.gz'), __dirname);
+	t.is(files.length, 3);
+	await fsP.rmdir(path.join(__dirname, 'edge_case_dots'), {recursive: true});
+});