diff --git a/.gitignore b/.gitignore
index 219b921..d505dde 100644
--- a/.gitignore
+++ b/.gitignore
@@ -43,3 +43,4 @@
 /libreswan-4.6.tar.gz
 /libreswan-4.9.tar.gz
 /libreswan-4.12.tar.gz
+/libreswan-4.15.tar.gz
diff --git a/libreswan.spec b/libreswan.spec
index bd65267..e30653e 100644
--- a/libreswan.spec
+++ b/libreswan.spec
@@ -30,8 +30,8 @@
 Name: libreswan
 Summary: Internet Key Exchange (IKEv1 and IKEv2) implementation for IPsec
 # version is generated in the release script
-Version: 4.12
-Release: %{?prever:0.}4%{?prever:.%{prever}}%{?dist}
+Version: 4.15
+Release: %{?prever:0.}1%{?prever:.%{prever}}%{?dist}
 License: GPLv2
 Url: https://libreswan.org/
 Source0: https://download.libreswan.org/%{?prever:development/}%{name}-%{version}%{?prever}.tar.gz
@@ -41,9 +41,6 @@ Source2: https://download.libreswan.org/cavs/ikev1_psk.fax.bz2
 Source3: https://download.libreswan.org/cavs/ikev2.fax.bz2
 %endif
 Patch: libreswan-4.6-ikev1-policy-defaults-to-drop.patch
-Patch: libreswan-4.12-ikev2-auth-delete-state.patch
-Patch: libreswan-4.12-ipv6-san.patch
-Patch: libreswan-4.12-ikev1-compute-keymat-default.patch
 
 BuildRequires: audit-libs-devel
 BuildRequires: bison
@@ -199,6 +196,9 @@ certutil -N -d sql:$tmpdir --empty-password
 %doc %{_mandir}/*/*
 
 %changelog
+* Tue Jul 30 2024 Daiki Ueno <dueno@redhat.com> - 4.15-1
+- Update to 4.15 (RHEL-50006)
+
 * Thu Jul 11 2024 Daiki Ueno <dueno@redhat.com> - 4.12-4
 - Bump release to synchronize with el9_5 package
 
diff --git a/sources b/sources
index 182ee16..53b545c 100644
--- a/sources
+++ b/sources
@@ -1,4 +1,4 @@
 SHA512 (ikev1_dsa.fax.bz2) = 627cbac14248bd68e8d22fbca247668a7749ef0c2e41df8d776d62df9a21403d3a246c0bd82c3faedce62de90b9f91a87f753e17b056319000bba7d2038461ac
 SHA512 (ikev1_psk.fax.bz2) = 1b2daec32edc56b410c036db2688c92548a9bd9914994bc7e555b301dd6db4497a6b3e89dc12ddf36826ae90b40fcde501a5a45c0d59098e07839073d219d467
 SHA512 (ikev2.fax.bz2) = 0d3748d1bd574f6f1f3e4db847eca126ce649566ea710ef227426f433122752b80d1d6b8acf9d0df07b5597c1e45447e3a2fcb3391756e834e8e75f99df8e51e
-SHA512 (libreswan-4.12.tar.gz) = 3a7f5ea5d97da357a8979a8807694a316d42ccc5f9c7b5867041abf2b9316ff8428f24cf307b6b6073c191896c0417f137abf78f9903aecde5e1ee1182577ce0
+SHA512 (libreswan-4.15.tar.gz) = 49a60688bb4a5241dbd791bdde0c71ae80cfb7383bb841ea0788a9d0237569d7ad79e59985c700526e3807817ddae77ebd57521897526fbb8fb93ffbea631efe