1diff --git a/pretix_passbook/apps.py b/pretix_passbook/apps.py
2index e34eee1..a7ad382 100644
3--- a/pretix_passbook/apps.py
4+++ b/pretix_passbook/apps.py
5@@ -22,15 +22,6 @@ class PassbookApp(AppConfig):
6 def ready(self):
7 from . import signals # NOQA
8
9- @cached_property
10- def compatibility_errors(self):
11- import shutil
12-
13- errs = []
14- if not shutil.which("openssl"):
15- errs.append("The OpenSSL binary is not installed or not in the PATH.")
16- return errs
17-
18 @cached_property
19 def compatibility_warnings(self):
20 errs = []
21diff --git a/pretix_passbook/forms.py b/pretix_passbook/forms.py
22index 2a38604..aec38de 100644
23--- a/pretix_passbook/forms.py
24+++ b/pretix_passbook/forms.py
25@@ -41,7 +41,7 @@ class CertificateFileField(forms.FileField):
26 return SimpleUploadedFile("cert.pem", content, "text/plain")
27
28 openssl_cmd = [
29- "openssl",
30+ "@openssl@",
31 "x509",
32 "-inform",
33 "DER",