diff --git a/Makefile b/Makefile
index 9fa18613566f..f125625efd60 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@
 VERSION = 5
 PATCHLEVEL = 3
 SUBLEVEL = 0
-EXTRAVERSION = -rc5
+EXTRAVERSION = -rc6
 NAME = Bobtail Squid
 
 # *DOCUMENTATION*