diff --git a/package.json b/package.json
index e6d9b3c..73095c5 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
     "japanese": "^1.2.0",
     "js-yaml": "^3.8.4",
     "kuromojin": "^1.3.2",
-    "node-cron": "^2.0.1",
+    "node-cron": "2.0.1",
     "nodemw": "^0.12.1",
     "unorm": "^1.4.1"
   },