diff --git a/pacemaker.spec b/pacemaker.spec
index 56c3c55..4cd572c 100644
--- a/pacemaker.spec
+++ b/pacemaker.spec
@@ -41,10 +41,10 @@
 ## can be incremented to build packages reliably considered "newer"
 ## than previously built packages with the same pcmkversion)
 %global pcmkversion 2.1.7
-%global specversion 4.rc3
+%global specversion 4.rc4
 
 ## Upstream commit (full commit ID, abbreviated commit ID, or tag) to build
-%global commit 80f8a320e3046986ae81b28470276163c0b0bdfa
+%global commit c858c13cb79431b5c8e5dda3ca44dd305fce946c
 
 ## Since git v2.11, the extent of abbreviation is autoscaled by default
 ## (used to be constant of 7), so we need to convey it for non-tags, too.
@@ -848,7 +848,12 @@ exit 0
 %license %{nagios_name}-%{nagios_hash}/COPYING
 
 %changelog
-* Thu Dec 8 2023 Klaus Wenninger <kwenning@redhat.com> - 2.1.7-0.4.rc3
+* Wed Dec 13 2023 Klaus Wenninger <kwenning@redhat.com> - 2.1.7-0.4.rc4
+- Update for new upstream tarball for release candidate: Pacemaker-2.1.7-rc4,
+  for full details, see included ChangeLog file or
+  https://github.com/ClusterLabs/pacemaker/releases/tag/Pacemaker-2.1.7-rc4
+
+* Thu Dec 7 2023 Klaus Wenninger <kwenning@redhat.com> - 2.1.7-0.4.rc3
 - Update for new upstream tarball for release candidate: Pacemaker-2.1.7-rc3,
   for full details, see included ChangeLog file or
   https://github.com/ClusterLabs/pacemaker/releases/tag/Pacemaker-2.1.7-rc3
diff --git a/sources b/sources
index 2e75028..35a9f36 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
 SHA512 (nagios-agents-metadata-105ab8a7b2c16b9a29cf1c1596b80136eeef332b.tar.gz) = 11ddeb48a4929e7642b6dfa9c7962aa1d7a1af1c569830f55ed6cd6773abac13377317327bc1db8411c8077884f83f81cc54d746c834b63a99fa6dc219b5caad
-SHA512 (pacemaker-80f8a320e.tar.gz) = 53127b4e5994840aa4b2e711ab71eaba200ead684ce2a71a81097c8516690b4b870b5262cac45ba4920632ce1d35831ed7f477516ecd3d0a3947743500cf8397
+SHA512 (pacemaker-c858c13cb.tar.gz) = 67a6669bb42dd7adcde2a99155086746a95a37262a14b6ca2c4f8f2706ba572ef2a3715cc40bbeb6988ae6a8979ed8ce208c890934ea0eb5d8448d84510cf3ce