diff --git a/pkcs7.go b/pkcs7.go
index cde0e10..0264466 100644
--- a/pkcs7.go
+++ b/pkcs7.go
@@ -301,6 +301,8 @@ func getHashForOID(oid asn1.ObjectIdentifier) (crypto.Hash, error) {
 	switch {
 	case oid.Equal(oidDigestAlgorithmSHA1):
 		return crypto.SHA1, nil
+  case oid.Equal(oidSHA256):
+    return crypto.SHA256, nil
 	}
 	return crypto.Hash(0), ErrUnsupportedAlgorithm
 }