diff --git a/EssentialCSharp.Web/wwwroot/lib/es-module-shims/package.json b/EssentialCSharp.Web/wwwroot/lib/es-module-shims/package.json
index 10ef092e..45aa125e 100644
--- a/EssentialCSharp.Web/wwwroot/lib/es-module-shims/package.json
+++ b/EssentialCSharp.Web/wwwroot/lib/es-module-shims/package.json
@@ -38,7 +38,7 @@
     "preact": "^10.5.14",
     "pretty-ms": "^3.2.0",
     "rimraf": "^3.0.2",
-    "rollup": "^2.58.0",
+    "rollup": "^4.22.4",
     "tachometer": "^0.5.10",
     "terser": "^5.10.0"
   },