diff --git a/api/loader/fileloader.go b/api/loader/fileloader.go
index 92bfc3f69..c2e7bb9e2 100644
--- a/api/loader/fileloader.go
+++ b/api/loader/fileloader.go
@@ -313,6 +313,9 @@ func (fl *fileLoader) Load(path string) ([]byte, error) {
 			return nil, err
 		}
 		defer resp.Body.Close()
+		if resp.StatusCode < 200 || resp.StatusCode > 299 {
+			return nil, fmt.Errorf("URL returned error %d (%s)", resp.StatusCode, http.StatusText(resp.StatusCode))
+		}
 		body, err := ioutil.ReadAll(resp.Body)
 		if err != nil {
 			return nil, err