diff --git a/server/static.go b/server/static.go
index da27a5d7..c91ea10a 100644
--- a/server/static.go
+++ b/server/static.go
@@ -25,8 +25,10 @@ func InitIndex() {
 	cdnUrl := strings.ReplaceAll(conf.Conf.Assets, "$version", conf.WebTag)
 	cdnUrl = strings.TrimRight(cdnUrl, "/")
 	conf.RawIndexHtml = string(data)
-	conf.RawIndexHtml = strings.ReplaceAll(conf.RawIndexHtml, "/CDN_URL", cdnUrl)
-	conf.RawIndexHtml = strings.ReplaceAll(conf.RawIndexHtml, "assets/", cdnUrl+"/assets/")
+	if strings.Contains(conf.RawIndexHtml, "CDN_URL") {
+		conf.RawIndexHtml = strings.ReplaceAll(conf.RawIndexHtml, "/CDN_URL", cdnUrl)
+		conf.RawIndexHtml = strings.ReplaceAll(conf.RawIndexHtml, "assets/", cdnUrl+"/assets/")
+	}
 }
 
 func Static(r *gin.Engine) {