diff --git a/python-eventlet-FTBFS2028.patch b/python-eventlet-FTBFS2028.patch
new file mode 100644
index 0000000..d110fda
--- /dev/null
+++ b/python-eventlet-FTBFS2028.patch
@@ -0,0 +1,50 @@
+https://github.com/eventlet/eventlet/pull/643
+
+From df6b965c1b03a688c643dc7f5845cb88287027d1 Mon Sep 17 00:00:00 2001
+From: "Bernhard M. Wiedemann" <bwiedemann@suse.de>
+Date: Fri, 28 Aug 2020 20:24:42 +0200
+Subject: [PATCH] Extend test cert to 2049
+
+This change makes tests pass after 2028
+Background:
+As part of my work on reproducible builds for openSUSE, I check that software still gives identical build results in the future.
+The usual offset is +15 years, because that is how long I expect some software will be used in some places.
+This showed up failing tests in our package build.
+
+See https://reproducible-builds.org/ for why this matters.
+---
+ tests/test_server.crt | 16 ++++++++--------
+ 1 file changed, 8 insertions(+), 8 deletions(-)
+
+diff --git a/tests/test_server.crt b/tests/test_server.crt
+index 67c9adc8b..78759e810 100644
+--- a/tests/test_server.crt
++++ b/tests/test_server.crt
+@@ -2,7 +2,7 @@
+ MIIDwjCCAqqgAwIBAgIJAN19NW1oDKKtMA0GCSqGSIb3DQEBCwUAMHYxCzAJBgNV
+ BAYTAlRTMQ0wCwYDVQQIDARUZXN0MQ0wCwYDVQQHDARUZXN0MRYwFAYDVQQKDA1U
+ ZXN0IEV2ZW50bGV0MQ0wCwYDVQQLDARUZXN0MQ0wCwYDVQQDDARUZXN0MRMwEQYJ
+-KoZIhvcNAQkBFgRUZXN0MB4XDTE4MDgyMjEzNDIxMVoXDTI4MDgxOTEzNDIxMVow
++KoZIhvcNAQkBFgRUZXN0MB4XDTIwMDgyODEzMTUxNloXDTQ5MTIzMTEzMTUxN1ow
+ djELMAkGA1UEBhMCVFMxDTALBgNVBAgMBFRlc3QxDTALBgNVBAcMBFRlc3QxFjAU
+ BgNVBAoMDVRlc3QgRXZlbnRsZXQxDTALBgNVBAsMBFRlc3QxDTALBgNVBAMMBFRl
+ c3QxEzARBgkqhkiG9w0BCQEWBFRlc3QwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAw
+@@ -13,11 +13,11 @@ Lvc6cJHMKaxHCeIBOL+z/9kJqhh30eqsmNB5AXSoV8b2B3MV3glW2vd5WJVYEWxl
+ 3+GNgzZJ3KGape7pcBYER7zg/yZLZxgNFlTCOZiysjNxC0liJA9tgUQhRc1gsqA8
+ dQxzvqW8kuZedmatjyM58WixvjymobC3AgMBAAGjUzBRMB0GA1UdDgQWBBQT3V3f
+ 8vCoqGXe6zySSjVP+J/P7zAfBgNVHSMEGDAWgBQT3V3f8vCoqGXe6zySSjVP+J/P
+-7zAPBgNVHRMBAf8EBTADAQH/MA0GCSqGSIb3DQEBCwUAA4IBAQAws7zXsftw5s/P
+-dnyFAf8q0WoVtWi9ljshWfJvTFMfuCqdSoNT+kIeQq071/RFW9YLqDZGXI4fyfzW
+-50A7xFm+Syy7wPOmfLJdPx5HRJ5jgIDlij9vL45W3mXEohkkzMCdjwXfOIQPOEEx
+-ZQHF57RaHlKEGexc/yvOLlOgKP23BOgB7pZjCC9divyDJ3ETlzgE+UTymHxmFM0i
+-TCAM9dGEl1QPr7zA08rNgVae+/uQksdM55QmQFkTAXisFPcxNgHSKOSHsDiUJvWG
+-7bJrwO6+T2wjRxWRD7anQV3DqBG1WteXA/dfYqjUi0QPqreWqNb+3OM60UwPJsvl
+-ZDfUrsbY
++7zAPBgNVHRMBAf8EBTADAQH/MA0GCSqGSIb3DQEBCwUAA4IBAQAowDu7bu/6DuLH
++yNv8Q27vhsHS2IbguGSTlpSObUqvIF1fv2UzjSl1jjmkN7IQqEjV7ql7NpmVGv5u
++4s5uKGID9q0Eq1wNKpqps16ABOb6I415j3NMq7r9bSNrlgPHrSYnySSyN2JyiXyR
++Q9wxY6YBQMHchFytYui9/A3WwmzfZkzZpN2AWlC/emiDlfbWT9bFO6tgImrD3BIi
++PJoTsc5SBmevUvOC6LPPIKq3/SdywgAi3AGKcyMlLhEjFX5lRA3GK3pDudRqKY2+
++3n6WcOut0RytatsNYqIMVakIGC4ZCLi69xSLlRVVvxnfGgJxw+mHLtlQxDz2GoQ+
++XAW8Yf8H
+ -----END CERTIFICATE-----
diff --git a/python-eventlet.changes b/python-eventlet.changes
index f3d9a86..3c7b783 100644
--- a/python-eventlet.changes
+++ b/python-eventlet.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Sun Dec 26 14:03:52 UTC 2021 - Bernhard Wiedemann <bwiedemann@suse.com>
+
+- Add python-eventlet-FTBFS2028.patch to fix build in 2028 (boo#1102840)
+
 -------------------------------------------------------------------
 Thu Dec 16 20:11:12 UTC 2021 - Ben Greiner <code@bnavigator.de>
 
diff --git a/python-eventlet.spec b/python-eventlet.spec
index f02e0fd..2932a40 100644
--- a/python-eventlet.spec
+++ b/python-eventlet.spec
@@ -31,6 +31,8 @@ Source:         https://files.pythonhosted.org/packages/source/e/eventlet/eventl
 Patch0:         denose-eventlet.patch
 # PATCH-FIX-UPSTREAM newdnspython.patch mcepl@suse.com -- patch is from gh#rthalley/dnspython#519, discussion in gh#eventlet/eventlet#638
 Patch1:         newdnspython.patch
+# PATCH-FIX-UPSTREAM https://github.com/eventlet/eventlet/pull/643
+Patch2:         python-eventlet-FTBFS2028.patch
 BuildRequires:  %{python_module setuptools}
 %if %{with python2}
 BuildRequires:  python2-monotonic >= 1.4