diff --git a/pkg/bbgo/environment.go b/pkg/bbgo/environment.go
index 91f4575df..1685c4472 100644
--- a/pkg/bbgo/environment.go
+++ b/pkg/bbgo/environment.go
@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"image/png"
 	"io/ioutil"
+	"math/rand"
 	"os"
 	"strings"
 	"sync"
@@ -27,6 +28,11 @@ import (
 	"github.com/c9s/bbgo/pkg/util"
 )
 
+func init() {
+	// randomize pulling
+	rand.Seed(time.Now().UnixNano())
+}
+
 var LoadedExchangeStrategies = make(map[string]SingleExchangeStrategy)
 var LoadedCrossExchangeStrategies = make(map[string]CrossExchangeStrategy)
 
diff --git a/pkg/exchange/binance/stream.go b/pkg/exchange/binance/stream.go
index 37352428a..77a1d660f 100644
--- a/pkg/exchange/binance/stream.go
+++ b/pkg/exchange/binance/stream.go
@@ -55,8 +55,6 @@ const writeTimeout = 10 * time.Second
 const listenKeyKeepAliveInterval = 10 * time.Minute
 
 func init() {
-	// randomize pulling
-	rand.Seed(time.Now().UnixNano())
 
 	debugBinanceDepth, _ = strconv.ParseBool(os.Getenv("DEBUG_BINANCE_DEPTH"))
 	if debugBinanceDepth {