diff --git a/lib/index.js b/lib/index.js
index 773dd97..4d2f757 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -224,10 +224,10 @@ export default class Now extends EventEmitter {
 }
 
 function toRelative (path, base) {
-  const fullBase = base.endsWith(SEP) ? base + SEP : base;
-  const relative = path.substr(fullBase.length);
-  if (relative.startsWith(SEP)) return relative.substr(1);
-  return relative;
+  const fullBase = base.endsWith(SEP) ? base : base + SEP;
+  let relative = path.substr(fullBase.length);
+  if (relative.startsWith(SEP)) relative = relative.substr(1);
+  return relative.replace(/\\/g, '/');
 }
 
 function responseError (res) {