diff --git a/package-lock.json b/package-lock.json
index 19a8553..b1f68e1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -202,6 +202,18 @@
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@@ -18457,6 +18775,24 @@
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+      "dev": true,
+      "requires": {
+        "ansi-colors": "^3.0.0",
+        "uuid": "^3.3.2"
+      },
+      "dependencies": {
+        "uuid": {
+          "version": "3.3.2",
+          "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.2.tgz",
+          "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA==",
+          "dev": true
+        }
+      }
+    },
     "webpack-merge": {
       "version": "4.1.2",
       "resolved": "https://registry.npmjs.org/webpack-merge/-/webpack-merge-4.1.2.tgz",
diff --git a/package.json b/package.json
index 9909410..e295c35 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
     "lintfix": "eslint . --ext .js,.json --ignore-path .gitignore --fix || true"
   },
   "devDependencies": {
-    "copy-webpack-plugin": "^4.6.0",
+    "copy-webpack-plugin": "^5.0.4",
     "eslint": "^5.15.1",
     "eslint-config-standard": "^12.0.0",
     "eslint-config-standard-preact": "^1.1.6",