diff --git a/app/app.go b/app/app.go
index 22123b0..23880da 100644
--- a/app/app.go
+++ b/app/app.go
@@ -129,6 +129,8 @@ import (
 
 	appparams "github.com/DoraFactory/doravota/app/params"
 	"github.com/DoraFactory/doravota/docs"
+
+	votatypes "github.com/DoraFactory/doravota/types"
 )
 
 const (
@@ -257,6 +259,8 @@ func init() {
 	}
 
 	DefaultNodeHome = filepath.Join(userHomeDir, "."+Name)
+
+	sdk.DefaultPowerReduction = votatypes.DefaultPowerReduction
 }
 
 // Override Wasm size limitation from WASMD.
diff --git a/types/precision.go b/types/precision.go
new file mode 100644
index 0000000..1e6050c
--- /dev/null
+++ b/types/precision.go
@@ -0,0 +1,13 @@
+package types
+
+import (
+	"math/big"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+)
+
+const (
+	BaseDenomUnit = 18
+)
+
+var DefaultPowerReduction = sdk.NewIntFromBigInt(new(big.Int).Exp(big.NewInt(10), big.NewInt(BaseDenomUnit), nil)) // 10^18
\ No newline at end of file