diff --git a/_constraints b/_constraints
deleted file mode 100644
index f2c2682..0000000
--- a/_constraints
+++ /dev/null
@@ -1,13 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<constraints>
-  <overwrite>
-   <conditions>
-     <arch>s390x</arch>
-   </conditions>
-    <hardware>
-     <memory>
-       <size unit="G">12</size>
-     </memory>
-   </hardware>
-  </overwrite>
-</constraints>
diff --git a/postgresql16.changes b/postgresql16.changes
index 913008b..93dbbbd 100644
--- a/postgresql16.changes
+++ b/postgresql16.changes
@@ -1,3 +1,13 @@
+-------------------------------------------------------------------
+Tue Mar 12 22:48:41 UTC 2024 - Aaron Puchert <aaronpuchert@alice-dsl.net>
+
+- Require LLVM <= 17 for now, because LLVM 18 doesn't seem to work.
+
+-------------------------------------------------------------------
+Thu Mar  7 15:04:40 UTC 2024 - Sarah Kriesch <sarah.kriesch@opensuse.org>
+
+- Remove constraints file because improved memory usage for s390x
+
 -------------------------------------------------------------------
 Thu Feb 29 14:36:42 UTC 2024 - Dominique Leuenberger <dimstar@opensuse.org>
 
diff --git a/postgresql16.spec b/postgresql16.spec
index 78928ba..44125c5 100644
--- a/postgresql16.spec
+++ b/postgresql16.spec
@@ -20,7 +20,7 @@
 %define pgmajor 16
 %define buildlibs 1
 %define tarversion %{pgversion}
-%define latest_supported_llvm_ver 18
+%define latest_supported_llvm_ver 17
 
 ### CUT HERE ###
 %define pgname postgresql%pgmajor