diff --git a/core/build_id.mk b/core/build_id.mk
index c5130dc..112d3f4 100644
--- a/core/build_id.mk
+++ b/core/build_id.mk
@@ -18,4 +18,4 @@
 # (like "CRB01").  It must be a single word, and is
 # capitalized by convention.
 
-BUILD_ID=BP1A.250305.019.W3
+BUILD_ID=BP1A.250305.019.W4