diff --git a/contrib/gana b/contrib/gana
index 880352a41..65b32359b 160000
--- a/contrib/gana
+++ b/contrib/gana
@@ -1 +1 @@
-Subproject commit 880352a419beee4864f863182dbc695c859ee3f7
+Subproject commit 65b32359b300f5369eff62fceb5001e609c2f339
diff --git a/src/json/json.c b/src/json/json.c
index b7afec8aa..2adf71187 100644
--- a/src/json/json.c
+++ b/src/json/json.c
@@ -615,8 +615,9 @@ TALER_JSON_get_error_code2 (const void *data,
   enum TALER_ErrorCode ec;
   json_error_t err;
 
-  json = json_loads (data,
+  json = json_loadb (data,
                      data_size,
+                     JSON_REJECT_DUPLICATES,
                      &err);
   if (NULL == json)
     return TALER_EC_INVALID;