diff --git a/citus-tools b/citus-tools
new file mode 160000
index 000000000..3376bd684
--- /dev/null
+++ b/citus-tools
@@ -0,0 +1 @@
+Subproject commit 3376bd6845f0614908ed304f5033bd644c82d3bf
diff --git a/configure b/configure
index 4cdb73c1b..26ccadfa9 100755
--- a/configure
+++ b/configure
@@ -2588,7 +2588,7 @@ fi
 if test "$with_pg_version_check" = no; then
     { $as_echo "$as_me:${as_lineno-$LINENO}: building against PostgreSQL $version_num (skipped compatibility check)" >&5
 $as_echo "$as_me: building against PostgreSQL $version_num (skipped compatibility check)" >&6;}
-elif test "$version_num" != '15' -a  "$version_num" != '16' -a  "$version_num" != '17'; then
+elif test "$version_num" != '15' -a  "$version_num" != '16' -a  "$version_num" != '17' -a  "$version_num" != '18'; then
    as_fn_error $? "Citus is not compatible with the detected PostgreSQL version ${version_num}." "$LINENO" 5
 else
    { $as_echo "$as_me:${as_lineno-$LINENO}: building against PostgreSQL $version_num" >&5
diff --git a/configure.ac b/configure.ac
index 53127894c..c64e1af4c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -80,7 +80,7 @@ AC_SUBST(with_pg_version_check)
 
 if test "$with_pg_version_check" = no; then
     AC_MSG_NOTICE([building against PostgreSQL $version_num (skipped compatibility check)])
-elif test "$version_num" != '15' -a  "$version_num" != '16' -a  "$version_num" != '17'; then
+elif test "$version_num" != '15' -a  "$version_num" != '16' -a  "$version_num" != '17' -a  "$version_num" != '18'; then
    AC_MSG_ERROR([Citus is not compatible with the detected PostgreSQL version ${version_num}.])
 else
    AC_MSG_NOTICE([building against PostgreSQL $version_num])