diff --git a/package.json b/package.json
index 5cf2798..a03483e 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
   "dependencies": {
     "commander": "^2.0.0",
     "underscore": ">=1.3.1",
-    "wordnet-db": "latest"
+    "wordnet-db": ">=3.1.4"
   },
   "devDependencies": {
     "mini-bench": "^1.0.0",