Removing grpc_alarm from core requires a major version bump for core
diff --git a/BUILD b/BUILD
index cd70722..08aac41 100644
--- a/BUILD
+++ b/BUILD
@@ -56,7 +56,7 @@
 # This should be updated along with build.yaml
 g_stands_for = "glamorous"
 
-core_version = "5.0.0-dev"
+core_version = "6.0.0-dev"
 
 version = "1.10.0-dev"