diff --git a/Gopkg.lock b/Gopkg.lock
index cac84aa..1f25efd 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -17,12 +17,40 @@
   revision = "a0583e0143b1624142adab07e0e97fe106d99561"
   version = "v1.3.0"
 
+[[projects]]
+  digest = "1:d867dfa6751c8d7a435821ad3b736310c2ed68945d05b50fb9d23aee0540c8cc"
+  name = "github.com/sirupsen/logrus"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "3e01752db0189b9157070a0e1668a620f9a85da2"
+  version = "v1.0.6"
+
+[[projects]]
+  branch = "master"
+  digest = "1:3f3a05ae0b95893d90b9b3b5afdb79a9b3d96e4e36e099d841ae602e4aca0da8"
+  name = "golang.org/x/crypto"
+  packages = ["ssh/terminal"]
+  pruneopts = "UT"
+  revision = "182538f80094b6a8efaade63a8fd8e0d9d5843dd"
+
+[[projects]]
+  branch = "master"
+  digest = "1:629034aef6b53eb8ea737e6d82cb5402907e2757fbab5ddf5e74c08b4c6473af"
+  name = "golang.org/x/sys"
+  packages = [
+    "unix",
+    "windows",
+  ]
+  pruneopts = "UT"
+  revision = "fa5fdf94c78965f1aa8423f0cc50b8b8d728b05a"
+
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
   input-imports = [
     "github.com/BurntSushi/toml",
     "github.com/go-sql-driver/mysql",
+    "github.com/sirupsen/logrus",
   ]
   solver-name = "gps-cdcl"
   solver-version = 1
diff --git a/Gopkg.toml b/Gopkg.toml
index 98621d5..85df0c5 100644
--- a/Gopkg.toml
+++ b/Gopkg.toml
@@ -36,3 +36,7 @@
 [prune]
   go-tests = true
   unused-packages = true
+
+[[constraint]]
+  name = "github.com/sirupsen/logrus"
+  version = "1.0.6"
diff --git a/main.go b/main.go
index 6ffebd3..f297567 100644
--- a/main.go
+++ b/main.go
@@ -3,13 +3,19 @@ package main
 import (
 	"flag"
 	"fmt"
-	"log"
 	"strings"
 
+	log "github.com/sirupsen/logrus"
 	"github.com/tukejonny/mysql-warmer/mysql"
 )
 
+func init() {
+	log.SetFormatter(&log.JSONFormatter{})
+	log.SetLevel(log.DebugLevel)
+}
+
 func MySQLWarmUp(config mysql.Config) {
+	log.Info("[+] Start warmup ...")
 	client, err := mysql.NewMySQLClient(mysql.MySQLDSNParams{
 		Username: config.MySQL.Username,
 		Password: config.MySQL.Password,
@@ -21,15 +27,17 @@ func MySQLWarmUp(config mysql.Config) {
 		log.Fatalf("Failed to connct Mysql: %s\n", err.Error())
 	}
 
+	log.Info("[*] Get table list ...")
 	tables, err := client.GetTables()
 	if err != nil {
 		log.Fatalf("Failed to get mysql tables: %s\n", err.Error())
 	}
 
 	for _, table := range tables {
-		fmt.Printf("[+] Warming up %s table...\n", table.Name)
+		log.Infof("[*] Warming up %s ...\n", table.Name)
 		// インデックスが無ければ次のテーブルへ
 		if len(table.Indexes) == 0 {
+			log.Warnf("[!] Skip %s", table.Name)
 			continue
 		}
 
@@ -42,7 +50,6 @@ func MySQLWarmUp(config mysql.Config) {
 
 			for col := range colMap {
 				var sumStmt string
-				log.Println(colMap[col])
 				switch colMap[col] {
 				case "INT":
 					sumStmt = fmt.Sprintf("SUM(`%s`)", col)
@@ -66,12 +73,12 @@ func MySQLWarmUp(config mysql.Config) {
 			strings.Join(cols, ","),
 		)
 
-		fmt.Printf("[*] Invoke %s ...\n", stmt)
+		log.Info("[*] Querying ...")
 		_, err := client.Client.Query(stmt)
 		if err != nil {
 			log.Fatalf("Failed to exeute warmup for %s: %s", table.Name, err.Error())
 		}
-		fmt.Println(" done!")
+		log.Info("[+] done!")
 	}
 }
 
@@ -97,6 +104,4 @@ func main() {
 		},
 	}
 	MySQLWarmUp(config)
-
-	fmt.Println("[+] Finish")
 }
diff --git a/mysql/innodb.go b/mysql/innodb.go
index e5485dc..c9fc9f4 100644
--- a/mysql/innodb.go
+++ b/mysql/innodb.go
@@ -7,6 +7,7 @@ import (
 	"strings"
 
 	_ "github.com/go-sql-driver/mysql"
+	log "github.com/sirupsen/logrus"
 )
 
 // MySQLのカラム型種別(大きく数値型、日時型、文字列型に分ける)
@@ -45,8 +46,10 @@ func NewMySQLClient(params MySQLDSNParams) (*MySQLClient, error) {
 	var dsn string
 	if len(params.UnixSock) > 0 {
 		// Unix Domain Socketが利用可能であれば、なるべく使う
+		log.Warn("[!] Use UNIX domain socket")
 		dsn = fmt.Sprintf("%s:%s@unix(%s)/%s", params.Username, params.Password, params.UnixSock, params.DbName)
 	} else {
+		log.Warn("[!] Use TCP connection")
 		// Unix Domain Socketが使えないならば、TCP接続
 		dsn = fmt.Sprintf("%s:%s@tcp(%s:%d)/%s", params.Username, params.Password, params.Hostname, params.Port, params.DbName)
 	}