md5->sha256 in usage details
diff --git a/examples/certgen.py b/examples/certgen.py
index 89c7ca4..c88ed38 100644
--- a/examples/certgen.py
+++ b/examples/certgen.py
@@ -30,7 +30,7 @@
     Create a certificate request.
 
     Arguments: pkey   - The key to associate with the request
-               digest - Digestion method to use for signing, default is md5
+               digest - Digestion method to use for signing, default is sha256
                **name - The name of the subject of the request, possible
                         arguments are:
                           C     - Country name
@@ -64,7 +64,7 @@
                             starts being valid
                notAfter   - Timestamp (relative to now) when the certificate
                             stops being valid
-               digest     - Digest method to use for signing, default is md5
+               digest     - Digest method to use for signing, default is sha256
     Returns:   The signed certificate in an X509 object
     """
     (issuerCert, issuerKey) = issuerCertKey