diff --git a/api/server/router/runner.go b/api/server/router/runner.go
index abd8b9088..89b85436f 100644
--- a/api/server/router/runner.go
+++ b/api/server/router/runner.go
@@ -34,7 +34,7 @@ func handleRunner(c *gin.Context) {
 
 	appName := c.Param("app")
 	if appName == "" {
-		host := strings.Split(c.Request.Header.Get("Host"), ":")[0]
+		host := strings.Split(c.Request.Host, ":")[0]
 		appName = strings.Split(host, ".")[0]
 	}