diff --git a/pre_commit_hooks/check_vcs_permalinks.py b/pre_commit_hooks/check_vcs_permalinks.py
index d67d5f5..139b41a 100644
--- a/pre_commit_hooks/check_vcs_permalinks.py
+++ b/pre_commit_hooks/check_vcs_permalinks.py
@@ -8,7 +8,7 @@ import sys
 
 
 GITHUB_NON_PERMALINK = re.compile(
-    b'https://github.com/[^/]+/[^/]+/blob/master/[^# ]+#L\d+',
+    b'https://github.com/[^/ ]+/[^/ ]+/blob/master/[^# ]+#L\d+',
 )
 
 
diff --git a/tests/check_vcs_permalinks_test.py b/tests/check_vcs_permalinks_test.py
index 31fd608..00e5396 100644
--- a/tests/check_vcs_permalinks_test.py
+++ b/tests/check_vcs_permalinks_test.py
@@ -15,7 +15,9 @@ def test_passing(tmpdir):
         # permalinks are ok
         b'https://github.com/asottile/test/blob/649e6/foo%20bar#L1\n'
         # links to files but not line numbers are ok
-        b'https://github.com/asottile/test/blob/master/foo%20bar\n',
+        b'https://github.com/asottile/test/blob/master/foo%20bar\n'
+        # regression test for overly-greedy regex
+        b'https://github.com/ yes / no ? /blob/master/foo#L1\n',
     )
     assert not main((f.strpath,))