diff --git a/isign/signer.py b/isign/signer.py
index 3379cbc7..c32d4d4d 100644
--- a/isign/signer.py
+++ b/isign/signer.py
@@ -157,7 +157,7 @@ def _get_team_id(self):
             '-noout'
         ]
         certificate_info = openssl_command(cmd)
-        subject_with_ou_match = re.compile(r'\s+Subject:.*OU=(\w+)')
+        subject_with_ou_match = re.compile(r'\s+Subject:.*OU\s?=\s?(\w+)')
         for line in certificate_info.splitlines():
             match = subject_with_ou_match.match(line)
             if match is not None: