diff --git a/coremain/version.go b/coremain/version.go
index 53bc9714b..a0a323921 100644
--- a/coremain/version.go
+++ b/coremain/version.go
@@ -2,7 +2,7 @@ package coremain
 
 // Various CoreDNS constants.
 const (
-	CoreVersion = "1.6.5"
+	CoreVersion = "1.6.6"
 	coreName    = "CoreDNS"
 	serverType  = "dns"
 )