diff --git a/releng/CDT.setup b/releng/CDT.setup
index 20cd3b5d1d4..66621439719 100644
--- a/releng/CDT.setup
+++ b/releng/CDT.setup
@@ -244,7 +244,7 @@
         <repository
             url="https://download.eclipse.org/tools/cdt/releases/latest"/>
         <repository
-            url="https://download.eclipse.org/tools/orbit/downloads/drops/R20201118194144/repository"/>
+            url="https://download.eclipse.org/tools/orbit/simrel/orbit-aggregation/2023-09"/>
         <repository
             url="https://download.eclipse.org/oomph/simrel-orbit/milestone/latest/"/>
         <repository