diff --git a/build/params.go b/build/params.go
index e810ff45f..aaa7b475e 100644
--- a/build/params.go
+++ b/build/params.go
@@ -84,14 +84,14 @@ const CollateralPrecision = 1000
 // /////
 // Devnet settings
 
-const TotalFilecoin = 2000000000
-const MiningRewardTotal = 1400000000
+const TotalFilecoin = 2_000_000_000
+const MiningRewardTotal = 1_400_000_000
 
 const InitialRewardStr = "153856861913558700202"
 
 var InitialReward *big.Int
 
-const FilecoinPrecision = 1000000000000000000
+const FilecoinPrecision = 1_000_000_000_000_000_000
 
 // six years
 // Blocks