diff --git a/config.go b/config.go
index 07446ec..811793a 100644
--- a/config.go
+++ b/config.go
@@ -22,3 +22,5 @@ type config struct {
 	secretARN   string
 	resourceARN string
 }
+
+const timeFormat = "2006-01-02 15:04:05.999999999"
diff --git a/executor.go b/executor.go
index 3313afc..6803560 100644
--- a/executor.go
+++ b/executor.go
@@ -62,7 +62,7 @@ func (r *Result) Next(dest []driver.Value) error {
 					layout = "2006-01-02"
 
 				case "DATETIME", "TIMESTAMP":
-					layout = "2006-01-02 15:04:05"
+					layout = timeFormat
 
 				case "YEAR":
 					layout = "2006"
diff --git a/stmt.go b/stmt.go
index 2485b60..84c8e17 100644
--- a/stmt.go
+++ b/stmt.go
@@ -17,9 +17,10 @@ package dapi
 import (
 	"context"
 	"database/sql/driver"
+	"time"
+
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/service/rdsdataservice"
-	"time"
 )
 
 type Stmt struct {
@@ -82,7 +83,7 @@ func asField(value driver.Value) *rdsdataservice.Field {
 	case string:
 		return &rdsdataservice.Field{StringValue: aws.String(v)}
 	case time.Time:
-		s := v.Format("2006-01-02 15:04:05")
+		s := v.Format(timeFormat)
 		return &rdsdataservice.Field{StringValue: aws.String(s)}
 	default:
 		return &rdsdataservice.Field{IsNull: aws.Bool(true)}