diff --git a/README.md b/README.md
index 710a8a2..928e2c6 100644
--- a/README.md
+++ b/README.md
@@ -31,6 +31,15 @@ URIs can be made relative to the individual LESS files with the global LESS conf
 <script>window.less = { relativeUrls: true }</script>
 ```
 
+Avoid caching
+---
+
+You can avoid caching by adding random "_t" parameter to URLs of less files. You can do this by adding next configuration option:
+
+```html
+<script>window.less = { avoidCaching: true }</script>
+```
+
 Installation and Setup
 ----------------------
 
diff --git a/lessc.js b/lessc.js
index f4b2a47..3a26f55 100644
--- a/lessc.js
+++ b/lessc.js
@@ -7742,6 +7742,10 @@ function loadFile(originalHref, currentFileInfo, callback, env, modifyVars) {
         return;
     }
 
+    if (less.avoidCaching) {
+        href = href + (href.indexOf("?") === -1 ? "?" : "&") + "_t=" + (Math.random() * Math.pow(10, 16));
+    }
+
     doXHR(href, env.mime, function (data, lastModified) {
         // per file cache
         fileCache[href] = data;