diff --git a/libs/route-utils/index.js b/libs/route-utils/index.js
index 158273b..c83aa01 100644
--- a/libs/route-utils/index.js
+++ b/libs/route-utils/index.js
@@ -58,7 +58,7 @@ const toInt = (v, def = 0, min = null, max = null) => {
   min = isFinite(min) ? (typeof min === 'string' ? parseInt(min) : min) : null
   max = isFinite(max) ? (typeof max === 'string' ? parseInt(max) : max) : null
   if (!isFinite(v)) return def
-  v = parseInt(v)
+  if (typeof v === 'string') v = parseInt(v)
   if (min !== null && v < min) v = min
   if (max !== null && v > max) v = max
   return v