diff --git a/ace-loader/package.json b/ace-loader/package.json
index 0b3ab40..207a57b 100644
--- a/ace-loader/package.json
+++ b/ace-loader/package.json
@@ -38,7 +38,7 @@
     "copy-webpack-plugin": "^8.1.0",
     "css": "^3.0.0",
     "css-loader": "^3.4.2",
-    "deccjsunit": "latest",
+    "deccjsunit": "1.0.3",
     "escodegen": "^2.0.0",
     "esprima": "^4.0.1",
     "hash-sum": "^1.0.2",