diff --git a/chain/mantra/param.json b/chain/mantra/param.json
index 0d292440cf..1e1a63c89c 100644
--- a/chain/mantra/param.json
+++ b/chain/mantra/param.json
@@ -18,7 +18,7 @@
     "fee" : {
         "base" : "0",
         "rate" : [
-            "0.002uom",
+            "0.002uom"
         ],
         "init_gas_limit" : 300000,
         "simul_gas_multiply" : 1.8,