diff --git a/main.go b/main.go
index 1e51bfd..f3f7bc2 100644
--- a/main.go
+++ b/main.go
@@ -28,7 +28,7 @@ func main() {
 	}
 
 	defaultHeaders := map[string]string{"User-Agent": "engine-api-cli-1.0"}
-	cli, err := client.NewClient("unix:///var/run/docker.sock", "v1.44", nil, defaultHeaders)
+	cli, err := client.NewClient("unix:///var/run/docker.sock", "v1.40", nil, defaultHeaders)
 	if err != nil {
 		log.Fatalf("unread: %s", err)
 	}