diff --git a/pkgs/servers/sql/postgresql/18.nix b/pkgs/servers/sql/postgresql/18.nix
index 9b8dbda07e9c..46211a7b5fae 100644
--- a/pkgs/servers/sql/postgresql/18.nix
+++ b/pkgs/servers/sql/postgresql/18.nix
@@ -1,7 +1,7 @@
 import ./generic.nix {
-  version = "18beta2";
-  rev = "refs/tags/REL_18_BETA3";
-  hash = "sha256-QpJONriQnRN75cCcsdu9TGt8Km7NQLs5diZx1pVruc4=";
+  version = "18rc1";
+  rev = "refs/tags/REL_18_RC1";
+  hash = "sha256-PDycGuKrEa00N1h/BsWUiwG7naE0f2wFFXpQSOhs/hY=";
   muslPatches = {
     dont-use-locale-a = {
       url = "https://git.alpinelinux.org/aports/plain/main/postgresql17/dont-use-locale-a-on-musl.patch?id=d69ead2c87230118ae7f72cef7d761e761e1f37e";