diff --git a/package.json b/package.json
index 578ad5b..1930434 100644
--- a/package.json
+++ b/package.json
@@ -50,7 +50,7 @@
     "yazl": "^2.5.1"
   },
   "devDependencies": {
-    "coveralls": "^3.0.5",
+    "coveralls": "^3.0.9",
     "eslint": "^6.1.0",
     "eslint-config-standard": "^13.0.1",
     "eslint-plugin-import": "^2.18.2",