pygost/asn1schemas/cert-selfsigned-example.py | 1 +

diff --git a/pygost/asn1schemas/cert-selfsigned-example.py b/pygost/asn1schemas/cert-selfsigned-example.py
old mode 100644
new mode 100755
index 2f48f95a945baaf128c3e12e26b2617966ac5f7bf922004079e7781218064bde..f515869771ffcd9f3e39d523a0ca44e684f38126cfd10dedb0a573321849b294
--- a/pygost/asn1schemas/cert-selfsigned-example.py
+++ b/pygost/asn1schemas/cert-selfsigned-example.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 """Create example self-signed X.509 certificate
 """