diff --git a/package.json b/package.json
index 0c8950d..5f0594c 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,7 @@
   },
   "optionalDependencies": {
     "brotli": "^1.3.1",
-    "iltorb": "^2.0.1"
+    "iltorb": "2.3.2"
   },
   "homepage": "https://github.com/mynameiswhm/brotli-webpack-plugin",
   "repository": {