diff --git a/deployment/config.json b/deployment/config.json
index 96e714a..987fed7 100644
--- a/deployment/config.json
+++ b/deployment/config.json
@@ -39,7 +39,7 @@
         {
           "oid": ".1.3.6.1.4.1.9676.1",
           "label": "time-req-pkts",
-          "diff": true"
+          "diff": "true"
         }
       ]
     },