diff --git a/python-cryptography.spec b/python-cryptography.spec
index 41eef9c..811c380 100644
--- a/python-cryptography.spec
+++ b/python-cryptography.spec
@@ -7,7 +7,7 @@
 
 Name:           python-%{srcname}
 Version:        35.0.0
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        PyCA's cryptography library
 
 License:        ASL 2.0 or BSD
@@ -33,6 +33,8 @@ BuildRequires:  python%{python3_pkgversion}-devel
 BuildRequires:  python%{python3_pkgversion}-setuptools
 BuildRequires:  python%{python3_pkgversion}-setuptools-rust >= 0.11.3
 BuildRequires:  python%{python3_pkgversion}-six >= 1.4.1
+# Cargo.toml requires asn1 0.6, but package FTBFS with 0.6.1
+BuildRequires:  rust-asn1-devel >= 0.6.4
 
 %if %{with tests}
 %if 0%{?fedora}
@@ -115,6 +117,9 @@ PYTHONPATH=${PWD}/vectors:%{buildroot}%{python3_sitearch} \
 %{python3_sitearch}/%{srcname}-%{version}-py*.egg-info
 
 %changelog
+* Thu Sep 30 2021 Christian Heimes <cheimes@redhat.com> - 35.0.0-2
+- Require rust-asn1 >= 0.6.4
+
 * Thu Sep 30 2021 Christian Heimes <cheimes@redhat.com> - 35.0-1
 - Update to 35.0.0 (#2009117)