diff --git a/CLOBBER b/CLOBBER
index db96c37a7049..91f0ca5b5fdb 100644
--- a/CLOBBER
+++ b/CLOBBER
@@ -22,4 +22,4 @@
 # changes to stick? As of bug 928195, this shouldn't be necessary! Please
 # don't change CLOBBER for WebIDL changes any more.
 
-Merge day clobber 2024-09-30
\ No newline at end of file
+Merge day clobber 2024-10-28
\ No newline at end of file
diff --git a/browser/config/version.txt b/browser/config/version.txt
index 6ed686ba8cf3..2181da1c583b 100644
--- a/browser/config/version.txt
+++ b/browser/config/version.txt
@@ -1 +1 @@
-128.4.0
+128.5.0
diff --git a/browser/config/version_display.txt b/browser/config/version_display.txt
index 46354d5dd1b6..2183b2b4daf0 100644
--- a/browser/config/version_display.txt
+++ b/browser/config/version_display.txt
@@ -1 +1 @@
-128.4.0esr
+128.5.0esr
diff --git a/config/milestone.txt b/config/milestone.txt
index 30fa59de0152..4c02fca68930 100644
--- a/config/milestone.txt
+++ b/config/milestone.txt
@@ -10,4 +10,4 @@
 # hardcoded milestones in the tree from these two files.
 #--------------------------------------------------------
 
-128.4.0
+128.5.0