diff --git a/build/params_mainnet.go b/build/params_mainnet.go
index 1612f4ab9..e2e2b8c8e 100644
--- a/build/params_mainnet.go
+++ b/build/params_mainnet.go
@@ -130,4 +130,4 @@ var WhitelistedBlock = MustParseCid("bafy2bzaceapyg2uyzk7vueh3xccxkuwbz3nxewjygu
 
 // CBDeliveryDelay is the delay before deliver in the synchronous consistent broadcast.
 // This determines the wait time for the detection of potential equivocations.
-var CBDeliveryDelay = 6 * time.Second
+var CBDeliveryDelay = 2 * time.Second