diff --git a/.build/.nvmrc b/.build/.nvmrc
index 357607e88..55bffd620 100644
--- a/.build/.nvmrc
+++ b/.build/.nvmrc
@@ -1 +1 @@
-16.6.2
+18.15.0
diff --git a/.build/package.json b/.build/package.json
index e1452ce14..17d50d6fa 100644
--- a/.build/package.json
+++ b/.build/package.json
@@ -32,7 +32,6 @@
     "node-wget": "0.4.3",
     "npm-run-all": "4.1.5",
     "null-loader": "4.0.1",
-    "optimize-css-assets-webpack-plugin": "6.0.1",
     "raw-loader": "4.0.2",
     "rimraf": "3.0.2",
     "style-loader": "3.2.1",
diff --git a/.nvmrc b/.nvmrc
index ef1c2f66f..55bffd620 100644
--- a/.nvmrc
+++ b/.nvmrc
@@ -1 +1 @@
-16.6.2
\ No newline at end of file
+18.15.0