diff --git a/dnscrypt-proxy/xtransport.go b/dnscrypt-proxy/xtransport.go
index a3e89615..e2d960ba 100644
--- a/dnscrypt-proxy/xtransport.go
+++ b/dnscrypt-proxy/xtransport.go
@@ -34,7 +34,7 @@ const (
 	DefaultBootstrapResolver = "9.9.9.9:53"
 	DefaultKeepAlive         = 5 * time.Second
 	DefaultTimeout           = 30 * time.Second
-	SystemResolverIPTTL      = 24 * time.Hour
+	SystemResolverIPTTL      = 12 * time.Hour
 	MinResolverIPTTL         = 4 * time.Hour
 	ExpiredCachedIPGraceTTL  = 15 * time.Minute
 )