diff --git a/libreswan.spec b/libreswan.spec
index df89596..adccc90 100644
--- a/libreswan.spec
+++ b/libreswan.spec
@@ -40,6 +40,8 @@ Source2: https://download.libreswan.org/cavs/ikev1_psk.fax.bz2
 Source3: https://download.libreswan.org/cavs/ikev2.fax.bz2
 %endif
 
+Patch1: libreswan-3.26-asn1-zu.patch
+
 Requires(post): bash coreutils systemd
 Requires(preun): systemd
 Requires(postun): systemd
@@ -105,6 +107,8 @@ sed -i "s:/usr/bin/python:/usr/bin/python3:" testing/x509/dist_certs.py
 # enable crypto-policies support
 sed -i "s:#[ ]*include \(.*\)\(/crypto-policies/back-ends/libreswan.config\)$:include \1\2:" programs/configs/ipsec.conf.in
 
+%patch1 -p1
+
 %build
 %if 0%{with_efence}
 %global efence "-lefence"
diff --git a/sources b/sources
index 4633056..9359c3a 100644
--- a/sources
+++ b/sources
@@ -1,4 +1,4 @@
-SHA512 (libreswan-3.25.tar.gz) = 246649cb5bef1d0690217d1080f3f6f175a0d7a5f27e5a7affdf291b2f418a11937e96b64716a33e6312530409a2c1b10b90e2fa5ec339a27c94c990d86ed517
 SHA512 (ikev1_dsa.fax.bz2) = 627cbac14248bd68e8d22fbca247668a7749ef0c2e41df8d776d62df9a21403d3a246c0bd82c3faedce62de90b9f91a87f753e17b056319000bba7d2038461ac
 SHA512 (ikev1_psk.fax.bz2) = 1b2daec32edc56b410c036db2688c92548a9bd9914994bc7e555b301dd6db4497a6b3e89dc12ddf36826ae90b40fcde501a5a45c0d59098e07839073d219d467
 SHA512 (ikev2.fax.bz2) = 0d3748d1bd574f6f1f3e4db847eca126ce649566ea710ef227426f433122752b80d1d6b8acf9d0df07b5597c1e45447e3a2fcb3391756e834e8e75f99df8e51e
+SHA512 (libreswan-3.26.tar.gz) = 10965a23197ef5d21a66dc0838066ceb620b2653f64471553284e0043fbc993584e497742b498e0be410427aeed3d8ce5bfdc6dfab59b8a1a1ba9a363473c4a4