diff --git a/lib/cache.js b/lib/cache.js
index d3726d6..90e277d 100644
--- a/lib/cache.js
+++ b/lib/cache.js
@@ -42,7 +42,7 @@ class BuildCache {
    * @returns {Promise<void>}
    */
   async set(absPath, result, originContent) {
-    const m = process.memoryUsage.rss();
+    const m = process.memoryUsage().rss;
     if (m / 1024 / 1024 > 250) {
       this.log('memory usage > 250M');
       this.clear();
diff --git a/package.json b/package.json
index f11e349..393af89 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "esbuild-css-modules-plugin",
-  "version": "2.2.10",
+  "version": "2.2.11",
   "description": "A esbuild plugin to bundle css modules into js(x)/ts(x).",
   "main": "index.js",
   "keywords": [