diff --git a/app.py b/app.py
index 83726d1..ad91edd 100644
--- a/app.py
+++ b/app.py
@@ -204,6 +204,7 @@ def create_certificate(ca_id, common_name, san_dns, san_ip, organization, organi
     prompt = no
     default_md = sha256
     distinguished_name = dn
+    req_extensions = req_ext
 
     [dn]
     CN = {common_name}
@@ -212,6 +213,11 @@ def create_certificate(ca_id, common_name, san_dns, san_ip, organization, organi
     C = {country}
     ST = {state}
     L = {locality}
+
+    [req_ext]
+    subjectAltName = @alt_names
+
+    [alt_names]
     """
 
     if san_dns or san_ip: