diff --git a/lib/module-utils.js b/lib/module-utils.js
index 416d29e..0a84d18 100644
--- a/lib/module-utils.js
+++ b/lib/module-utils.js
@@ -39,14 +39,14 @@ function normalizeScriptPath(scriptPath) {
 
 function normaliseSeparator(pathToNormalise) {
   if (path.sep === '\\') {
-    return pathToNormalise.replace('/', '\\');
+    return pathToNormalise.replace(/\//g, '\\');
   }
   return pathToNormalise;
 }
 
 function denormaliseSeparator(pathToDenormalise) {
   if (path.sep === '\\') {
-    return pathToDenormalise.replace('\\', '/');
+    return pathToDenormalise.replace(/\\/g, '/');
   }
   return pathToDenormalise;
 }