diff --git a/chromeos_version.sh b/chromeos_version.sh
index 2b03269e80..c9b433841f 100755
--- a/chromeos_version.sh
+++ b/chromeos_version.sh
@@ -26,7 +26,7 @@ export CHROMEOS_VERSION_MINOR=7
 # Increment by 2 in trunk after making a release branch.
 # Does not reset on a major/minor change (always increases).
 # (Trunk is always odd; branches are always even).
-export CHROMEOS_VERSION_BRANCH=51
+export CHROMEOS_VERSION_BRANCH=53
 
 # Patch number.
 # Increment by 1 each release on a branch.