diff --git a/internal/config/config.go b/internal/config/config.go
index 373aced..ddfbdf1 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -8,8 +8,9 @@ import (
 )
 
 var (
-	Enable   = true
-	HostName string
+	Enable = true
+	Host   string
+	Addr   = ":6060"
 )
 
 func init() {
@@ -24,8 +25,13 @@ func init() {
 		Enable = enable
 	}
 
-	hostName, ok := os.LookupEnv("HOST_NAME")
+	host, ok := os.LookupEnv("ISUTOOLS_HOST_NAME")
 	if ok {
-		HostName = hostName
+		Host = host
+	}
+
+	addr, ok := os.LookupEnv("ISUTOOLS_ADDR")
+	if ok {
+		Addr = addr
 	}
 }
diff --git a/profiler/pyroscope.go b/profiler/pyroscope.go
index 934def7..adeb0c8 100644
--- a/profiler/pyroscope.go
+++ b/profiler/pyroscope.go
@@ -57,8 +57,8 @@ func init() {
 
 func pyroscopeStart() error {
 	tagMap := map[string]string{}
-	if config.HostName != "" {
-		tagMap["hostname"] = config.HostName
+	if config.Host != "" {
+		tagMap["hostname"] = config.Host
 	}
 
 	_, err := pyroscope.Start(pyroscope.Config{
diff --git a/server.go b/server.go
index 006a9a9..9f03818 100644
--- a/server.go
+++ b/server.go
@@ -3,7 +3,6 @@ package isutools
 import (
 	"log"
 	"net/http"
-	"os"
 
 	_ "net/http/pprof"
 
@@ -17,23 +16,18 @@ func init() {
 		return
 	}
 
-	addr, ok := os.LookupEnv("ISUTOOL_ADDR")
-	if !ok {
-		addr = ":6060"
-	}
-
 	mux := http.NewServeMux()
 	profiler.Register(mux)
 	benchmark.Register(mux)
 
 	go func() {
 		server := http.Server{
-			Addr:    addr,
+			Addr:    config.Addr,
 			Handler: mux,
 		}
 		err := server.ListenAndServe()
 		if err != nil {
-			log.Printf("failed to listen and serve(%s): %v", addr, err)
+			log.Printf("failed to listen and serve(%s): %v", config.Addr, err)
 		}
 	}()
 }