diff --git a/cleanhttp.go b/cleanhttp.go
index 8d306bf..fe28d15 100644
--- a/cleanhttp.go
+++ b/cleanhttp.go
@@ -32,6 +32,7 @@ func DefaultPooledTransport() *http.Transport {
 		IdleConnTimeout:       90 * time.Second,
 		TLSHandshakeTimeout:   10 * time.Second,
 		ExpectContinueTimeout: 1 * time.Second,
+		ForceAttemptHTTP2:     true,
 		MaxIdleConnsPerHost:   runtime.GOMAXPROCS(0) + 1,
 	}
 	return transport
diff --git a/go.mod b/go.mod
index 310f075..005ccde 100644
--- a/go.mod
+++ b/go.mod
@@ -1 +1,3 @@
 module github.com/hashicorp/go-cleanhttp
+
+go 1.13