diff --git a/src/utils.js b/src/utils.js
index e830a5daf..52ffe0bb7 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -21,6 +21,7 @@ limitations under the License.
  */
 
 const unhomoglyph = require('unhomoglyph');
+import Promise from 'bluebird';
 
 /**
  * Encode a dictionary of query parameters.