diff --git a/searx/static/themes/oscar/package.json b/searx/static/themes/oscar/package.json
index 089793f69..951b2c195 100644
--- a/searx/static/themes/oscar/package.json
+++ b/searx/static/themes/oscar/package.json
@@ -1,6 +1,6 @@
 {
     "devDependencies": {
-        "grunt": "~1.4.1",
+        "grunt": "~1.5.2",
         "grunt-cli": "^1.4.3",
         "grunt-contrib-concat": "~2.0.0",
         "grunt-contrib-copy": "^1.0.0",