diff --git a/dns/dns.go b/dns/dns.go
index d1d3b75..0eb5fda 100644
--- a/dns/dns.go
+++ b/dns/dns.go
@@ -30,7 +30,7 @@ func CacheLookup(recordType, hostname string) ([]net.IP, error) {
 	return ips, nil
 }
 
-// Lookup looksup the record using Go's default resolver
+// Lookup looks up the record using Go's default resolver
 func Lookup(recordType, hostname string) ([]net.IP, error) {
 	host := hostname
 	if url, err := url.Parse(hostname); err != nil {
diff --git a/http/client.go b/http/client.go
index 040688b..82b571d 100644
--- a/http/client.go
+++ b/http/client.go
@@ -209,11 +209,13 @@ func (c *Client) roundTrip(r *Request) (resp *Response, err error) {
 	} else if h := r.getHeader("Host"); h != "" {
 		host = h
 	} else {
-		host = r.url.Host
+		host = r.url.Hostname()
 	}
 
-	if ips, _ := dns.CacheLookup("A", host); len(ips) > 0 {
-		host = ips[0].String()
+	if c.cacheDNS {
+		if ips, _ := dns.CacheLookup("A", host); len(ips) > 0 {
+			host = ips[0].String()
+		}
 	}
 
 	req, err := http.NewRequestWithContext(r.ctx, r.method, r.url.String(), r.body)