diff --git a/src/PatternMatcher.php b/src/PatternMatcher.php
index 0f2b1bf..cd00f29 100644
--- a/src/PatternMatcher.php
+++ b/src/PatternMatcher.php
@@ -62,6 +62,8 @@ private function isMatch(Pattern $pattern, string $filename): bool
                 '*' => '[^\/]+',
                 '?' => '[^\/]',
                 '**' => '.*',
+                '/**' => '\/.*',
+                '**/' => '.*\/',
                 '/**/' => '\/([^\/]+\/)*',
             ];
 
diff --git a/tests/Fixtures/CODEOWNERS.example b/tests/Fixtures/CODEOWNERS.example
index 1ab69af..1bbb254 100644
--- a/tests/Fixtures/CODEOWNERS.example
+++ b/tests/Fixtures/CODEOWNERS.example
@@ -38,6 +38,22 @@ apps/ @octocat
 # directory in the root of your repository.
 /docs/ @doctocat
 
+# A leading "**" followed by a slash means match in all directories.
+# For example, "**/foo" matches file or directory "foo" anywhere,
+# the same as pattern "foo". "**/foo/bar" matches file or directory
+# "bar" anywhere that is directly under directory "foo".
+**/foo @doctocat
+
+# A trailing "/**" matches everything inside.
+# For example, "abc/**" matches all files inside directory "abc"
+# with infinite depth.
+abc/** @doctocat
+
+# A slash followed by two consecutive asterisks then a slash ma
+# zero or more directories. For example, "a/**/b" matches "a/b",
+# "a/x/b", "a/x/y/b" and so on.
+a/**/b @doctocat
+
 # In this example nobody owns the files
 # This line should be ignored by the parser.
 /src
diff --git a/tests/ParserTest.php b/tests/ParserTest.php
index 04cd26f..9aeca64 100644
--- a/tests/ParserTest.php
+++ b/tests/ParserTest.php
@@ -51,6 +51,9 @@ public function testParsingResultsInPatterns()
             new Pattern('docs/*', ['docs@example.com']),
             new Pattern('apps/', ['@octocat']),
             new Pattern('/docs/', ['@doctocat']),
+            new Pattern('**/foo', ['@doctocat']),
+            new Pattern('abc/**', ['@doctocat']),
+            new Pattern('a/**/b', ['@doctocat']),
         ], $patterns);
     }
 
@@ -66,6 +69,9 @@ public function testParsingStringResultsInPatterns()
             new Pattern('docs/*', ['docs@example.com']),
             new Pattern('apps/', ['@octocat']),
             new Pattern('/docs/', ['@doctocat']),
+            new Pattern('**/foo', ['@doctocat']),
+            new Pattern('abc/**', ['@doctocat']),
+            new Pattern('a/**/b', ['@doctocat']),
         ], $patterns);
     }
 }
diff --git a/tests/PatternMatcherTest.php b/tests/PatternMatcherTest.php
index bf8b4a3..5572bd6 100644
--- a/tests/PatternMatcherTest.php
+++ b/tests/PatternMatcherTest.php
@@ -66,6 +66,11 @@ public function provideCorrectMatchIsReturnedForFilename(): array
             // does NOT match "foo/bar/file.ext"
 
             // **
+            [new Pattern('**/c', ['@owner']), 'a/c'],
+            [new Pattern('**/c', ['@owner']), 'b/c'],
+            [new Pattern('**/c', ['@owner']), 'a/b/c'],
+            [new Pattern('a/**', ['@owner']), 'a/b'],
+            [new Pattern('a/**', ['@owner']), 'a/b/c'],
             [new Pattern('a/**/b', ['@owner']), 'a/b'],
             [new Pattern('a/**/b', ['@owner']), 'a/x/b'],
             [new Pattern('a/**/b', ['@owner']), 'a/x/y/b'],
@@ -126,6 +131,11 @@ public function provideNoMatchFoundExceptionIsThrownForFilename(): array
             [new Pattern('*.ext', ['@owner']), 'fooext'],
             [new Pattern('*.ext', ['@owner']), 'foo/ext'],
             [new Pattern('foo/*', ['@owner']), 'foo/bar/file.ext'],
+
+            // **
+            [new Pattern('**/foo', ['@owner']), 'foo.ext'],
+            [new Pattern('**/foo', ['@owner']), 'bar-foo/file.ext'],
+            [new Pattern('foo/**', ['@owner']), 'foo.ext'],
         ];
     }
 }