diff --git a/internal/blacklist.go b/internal/blacklist.go
index 446fb1c..2634383 100644
--- a/internal/blacklist.go
+++ b/internal/blacklist.go
@@ -12,7 +12,7 @@ import (
 	"github.com/miekg/dns"
 )
 
-const blockTTL uint32 = 300
+const blockTTL uint32 = 604800
 
 var nullIPv4 = net.IPv4(0, 0, 0, 0)
 var nullIPv6 = net.ParseIP("::/0")