diff --git a/ace-loader/package-lock.json b/ace-loader/package-lock.json
index 22fd274..0c5f154 100644
--- a/ace-loader/package-lock.json
+++ b/ace-loader/package-lock.json
@@ -2562,6 +2562,11 @@
       "integrity": "sha1-9lNNFRSCabIDUue+4m9QH5oZEpA=",
       "dev": true
     },
+    "deccjsunit": {
+      "version": "1.0.4",
+      "resolved": "https://registry.nlark.com/deccjsunit/download/deccjsunit-1.0.4.tgz",
+      "integrity": "sha512-fkOzBz9uNKElrm6VGrisXLbAmLshcqBoqYAyo2+v9uceAkv75xh9dWAUmnZoWE/v4ujqYHylaudON1nj+LPuPA=="
+    },
     "decode-uri-component": {
       "version": "0.2.0",
       "resolved": "https://registry.nlark.com/decode-uri-component/download/decode-uri-component-0.2.0.tgz",
diff --git a/ace-loader/package.json b/ace-loader/package.json
index b49aabd..f996f74 100644
--- a/ace-loader/package.json
+++ b/ace-loader/package.json
@@ -38,6 +38,7 @@
     "copy-webpack-plugin": "^8.1.0",
     "css": "^3.0.0",
     "css-loader": "^3.4.2",
+    "deccjsunit": "1.0.4",
     "escodegen": "^2.0.0",
     "esprima": "^4.0.1",
     "hash-sum": "^1.0.2",