diff --git a/sse/encoder.go b/sse/encoder.go
index 1f336bec..b5b9779a 100644
--- a/sse/encoder.go
+++ b/sse/encoder.go
@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"strconv"
 
 	"github.com/anycable/anycable-go/common"
 	"github.com/anycable/anycable-go/encoders"
@@ -67,7 +68,7 @@ func (e *Encoder) Encode(msg encoders.EncodedMessage) (*ws.SentFrame, error) {
 	if msgType == "disconnect" {
 		dmsg, ok := msg.(*common.DisconnectMessage)
 		if ok && !dmsg.Reconnect {
-			payload += "\nretry: " + fmt.Sprintf("%d", retryNoReconnect)
+			payload += "\nretry: " + strconv.Itoa(retryNoReconnect)
 		}
 	}