diff --git a/configure b/configure
index f2115d5898b..4ffd27f12bf 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for PostgreSQL 18beta3.
+# Generated by GNU Autoconf 2.69 for PostgreSQL 18rc1.
 #
 # Report bugs to <pgsql-bugs@lists.postgresql.org>.
 #
@@ -582,8 +582,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='PostgreSQL'
 PACKAGE_TARNAME='postgresql'
-PACKAGE_VERSION='18beta3'
-PACKAGE_STRING='PostgreSQL 18beta3'
+PACKAGE_VERSION='18rc1'
+PACKAGE_STRING='PostgreSQL 18rc1'
 PACKAGE_BUGREPORT='pgsql-bugs@lists.postgresql.org'
 PACKAGE_URL='https://www.postgresql.org/'
 
@@ -1468,7 +1468,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures PostgreSQL 18beta3 to adapt to many kinds of systems.
+\`configure' configures PostgreSQL 18rc1 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1533,7 +1533,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of PostgreSQL 18beta3:";;
+     short | recursive ) echo "Configuration of PostgreSQL 18rc1:";;
    esac
   cat <<\_ACEOF
 
@@ -1724,7 +1724,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-PostgreSQL configure 18beta3
+PostgreSQL configure 18rc1
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -2477,7 +2477,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by PostgreSQL $as_me 18beta3, which was
+It was created by PostgreSQL $as_me 18rc1, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -20089,7 +20089,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by PostgreSQL $as_me 18beta3, which was
+This file was extended by PostgreSQL $as_me 18rc1, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -20160,7 +20160,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-PostgreSQL config.status 18beta3
+PostgreSQL config.status 18rc1
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 
diff --git a/configure.ac b/configure.ac
index 38b5442407c..d13de054c8c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -17,7 +17,7 @@ dnl Read the Autoconf manual for details.
 dnl
 m4_pattern_forbid(^PGAC_)dnl to catch undefined macros
 
-AC_INIT([PostgreSQL], [18beta3], [pgsql-bugs@lists.postgresql.org], [], [https://www.postgresql.org/])
+AC_INIT([PostgreSQL], [18rc1], [pgsql-bugs@lists.postgresql.org], [], [https://www.postgresql.org/])
 
 m4_if(m4_defn([m4_PACKAGE_VERSION]), [2.69], [], [m4_fatal([Autoconf version 2.69 is required.
 Untested combinations of 'autoconf' and PostgreSQL versions are not
diff --git a/meson.build b/meson.build
index 52e21ce956f..973e8890bbd 100644
--- a/meson.build
+++ b/meson.build
@@ -8,7 +8,7 @@
 
 project('postgresql',
   ['c'],
-  version: '18beta3',
+  version: '18rc1',
   license: 'PostgreSQL',
 
   # We want < 0.56 for python 3.5 compatibility on old platforms. EPEL for