diff --git a/upstream/upstream_doh.go b/upstream/upstream_doh.go
index 1a285a2ba..a292e1067 100644
--- a/upstream/upstream_doh.go
+++ b/upstream/upstream_doh.go
@@ -398,6 +398,7 @@ func (p *dnsOverHTTPS) createTransport() (t http.RoundTripper, err error) {
 		// make golang http.Client attempt to use HTTP/2. Otherwise, it would
 		// only be used when negotiated on the TLS level.
 		ForceAttemptHTTP2: true,
+		Proxy:             http.ProxyFromEnvironment,
 	}
 
 	// Explicitly configure transport to use HTTP/2.