diff --git a/nh_eobs_mobile/static/dev/less/package.json b/nh_eobs_mobile/static/dev/less/package.json
index 8ddbd88c..232af015 100644
--- a/nh_eobs_mobile/static/dev/less/package.json
+++ b/nh_eobs_mobile/static/dev/less/package.json
@@ -9,6 +9,6 @@
     "gulp-kss": "0.0.2",
     "gulp-less": "3.0.5",
     "gulp-util": "3.0.4",
-    "gulp-flatten": "0.2.0"
+    "gulp-flatten": "0.4.0"
   }
 }
\ No newline at end of file