diff --git a/ipydeps/ipydeps.py b/ipydeps/ipydeps.py
index b432404..c276230 100644
--- a/ipydeps/ipydeps.py
+++ b/ipydeps/ipydeps.py
@@ -24,7 +24,7 @@
     get_stdlib_packages,
 )
 
-package_name_pattern = re.compile(r'([A-Za-z][A-Za-z0-9_\-]+(((<|>|<=|>=|==|~=)[0-9]+\.[0-9]+(\.[0-9]+)*)((\.?(a|b|rc|post|dev)[0-9]+)|\+[A-Za-z0-9_\-\.]+)*)?)')
+package_name_pattern = re.compile(r'([A-Za-z][A-Za-z0-9_\-]+(\[(([A-Za-z][A-Za-z0-9_\-]+,?)*[A-Za-z][A-Za-z0-9_\-]+)?\])?(((<|>|<=|>=|==|~=)[0-9]+\.[0-9]+(\.[0-9]+)*)((\.?(a|b|rc|post|dev)[0-9]+)|\+[A-Za-z0-9_\-\.]+)*)?)')
 pip_run_args = [sys.executable, '-m', 'pip']
 
 def run_pip(
diff --git a/tests/test_ipydeps.py b/tests/test_ipydeps.py
index 0ddbf82..df992a2 100644
--- a/tests/test_ipydeps.py
+++ b/tests/test_ipydeps.py
@@ -17,10 +17,12 @@
 
 def test_get_pkg_names():
     assert len(get_pkg_names('abc DEF hIj')) == 3
+    assert len(get_pkg_names('abc[DEF] HIJ kLo[mnp,qrs]')) == 3
 
 def test_pkg_name_list():
     assert len(get_pkg_names('abc DEF hIj')) == 3
     assert len(get_pkg_names(['abc', 'DEF', 'hIj'])) == 3
+    assert len(get_pkg_names(['abc[DEF]', 'HIJ', 'kLo[mnp,qrs]'])) == 3
 
 def test_bad_pkg_name():
     assert len(get_pkg_names(['exec', 'exec()'])) == 1
@@ -67,6 +69,11 @@ def test_version_specifier_special_release_with_seperator():
     assert len(packages) == 1
     assert 'bar==5.4.0.dev1' in packages
 
+def test_version_specifier_with_extras():
+    packages = get_pkg_names('bar[extra]==5.4.0.dev1')
+    assert len(packages) == 1
+    assert 'bar[extra]==5.4.0.dev1' in packages
+
 def test_version_specifier_plus_sign_release():
     packages = get_pkg_names('bar~=2.0.43+2')
     assert len(packages) == 1