diff --git a/ace-loader/package.json b/ace-loader/package.json
index 0b3ab4053b356fbe4f766df1deb55b9545282bd0..207a57b1498873ae7339c1748bdf50bcf111e63a 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",