better for cross-platform
diff --git a/generator/src/main/groovy/generator/PageTemplate.groovy b/generator/src/main/groovy/generator/PageTemplate.groovy
index 8909e23..a464ed2 100644
--- a/generator/src/main/groovy/generator/PageTemplate.groovy
+++ b/generator/src/main/groovy/generator/PageTemplate.groovy
@@ -39,7 +39,7 @@
     String relative(String path) {
         String base = (String) model.get(BASEDIR)
         if (base && !path.startsWith('http') && !path.startsWith(File.separator)) {
-            String up = "..${File.separator}"
+            String up = "../"
             "${up*(1+base.count(File.separator))}$path"
         } else {
             path