diff --git a/.gitignore b/.gitignore
index d38fc2e..fcd6170 100644
--- a/.gitignore
+++ b/.gitignore
@@ -259,3 +259,5 @@ samba-3.6.0pre1.tar.gz
 /samba-4.15.0rc2.tar.asc
 /samba-4.15.0rc3.tar.xz
 /samba-4.15.0rc3.tar.asc
+/samba-4.15.0rc4.tar.xz
+/samba-4.15.0rc4.tar.asc
diff --git a/samba.spec b/samba.spec
index 29513ba..d9dd415 100644
--- a/samba.spec
+++ b/samba.spec
@@ -129,7 +129,7 @@
 
 %define samba_requires_eq()  %(LC_ALL="C" echo '%*' | xargs -r rpm -q --qf 'Requires: %%{name} = %%{epoch}:%%{version}\\n' | sed -e 's/ (none):/ /' -e 's/ 0:/ /' | grep -v "is not")
 
-%global baserelease 8
+%global baserelease 9
 
 %global samba_version 4.15.0
 %global talloc_version 2.3.3
@@ -137,7 +137,7 @@
 %global tevent_version 0.11.0
 %global ldb_version 2.4.0
 # This should be rc1 or nil
-%global pre_release rc3
+%global pre_release rc4
 
 %global samba_release %{baserelease}
 %if "x%{?pre_release}" != "x"
@@ -4068,6 +4068,10 @@ fi
 %endif
 
 %changelog
+* Wed Sep 01 2021 Guenther Deschner <gdeschner@redhat.com> - 4.15.0-0.9.rc4
+- Update to Samba 4.15.0rc4
+- resolves: #2000079
+
 * Thu Aug 26 2021 Guenther Deschner <gdeschner@redhat.com> - 4.15.0-0.8.rc3
 - Update to Samba 4.15.0rc3
 - resolves: #1998024
diff --git a/sources b/sources
index a810c11..3aacdc3 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (samba-4.15.0rc3.tar.xz) = 4f3fd39b22cbc08001f1b9f4295a1acba22b6d0c82235704d35667329e608b844f5b793e39fd84e3b4bd7956ae7991c2958031531c673ddbde593799e6af5d47
-SHA512 (samba-4.15.0rc3.tar.asc) = 6f8d7a69d643208c2dbfd4423b5351319c4a8361cac2ea5fa378787a885d63794018ec96334a847a5aaf2e0ad494846164a2a13aab7ffe1b9f35afa671c531d8
+SHA512 (samba-4.15.0rc4.tar.xz) = 0fc9fce786b539dec7dd93e6403d5ff4e67e7cb17a4b064e6af23c98e4b122b1ce12653c5dcb7aa4317d91b729f98864988981456a8344e0ff7eb66bf8956104
+SHA512 (samba-4.15.0rc4.tar.asc) = dd2823db2b2b16d0a0c3cb61410320812eeae38f4a76b83951dec8d72e2821043af960aae3929d132a33aa7d7cf1f481446ed32738393192050b147d07116664