diff --git a/package.json b/package.json
index f4b7e11..a784990 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
   },
   "devDependencies": {
     "@types/encoding-japanese": "^1.0.15",
-    "@types/jszip": "3.1.4",
+    "@types/jszip": "3.1.5",
     "@types/mocha": "^5.0.0",
     "@types/node": "^10.0.3",
     "@types/power-assert": "^1.4.29",