diff --git a/build/release/build.sh b/build/release/build.sh
index 81074d20dd..fe61e5f195 100755
--- a/build/release/build.sh
+++ b/build/release/build.sh
@@ -23,7 +23,7 @@ SUMMARY="OmniOS release information"
 DESC="OmniOS /etc/release and /etc/os-release files"
 
 # Update the following line with the current release suffix
-RELSUFFIX=ap
+RELSUFFIX=at
 
 RELEASE=${RELVER}${RELSUFFIX}
 RELDATE="`date +%Y.%m.%d`"
diff --git a/doc/ReleaseNotes.md b/doc/ReleaseNotes.md
index bef4931501..b51eee01e0 100644
--- a/doc/ReleaseNotes.md
+++ b/doc/ReleaseNotes.md
@@ -4,6 +4,24 @@
 
 # Release Notes for OmniOSce v11 r151044
 
+## r151044at (2023-09-20)
+Weekly release for w/c 18th of September 2023.
+> This is a non-reboot update
+
+### Security Fixes
+
+* Curl has been updated to version 8.3.0
+
+* OpenJDK has has been updated to 11.0.20.1+1 and 17.0.8.1+1
+
+* Python has been updated to version 3.10.13
+
+* OpenSSL has been updated to version 3.0.11
+
+<br>
+
+---
+
 ## r151044ap (2023-08-24)
 Weekly release for w/c 21st of August 2023.
 > This update requires a reboot