diff --git a/.gitignore b/.gitignore
index b9576069..15cc1f70 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,6 +11,7 @@ out/
 npm-debug.log
 node_modules/
 package-lock.json
+.nyc_output/
 
 # Generated by scripts/configure.js
 config.gypi
diff --git a/package.json b/package.json
index 8bd3274c..ab0dd64e 100644
--- a/package.json
+++ b/package.json
@@ -51,9 +51,9 @@
   },
   "homepage": "https://github.com/nodejs/llnode#readme",
   "devDependencies": {
-    "codecov": "^3.1.0",
-    "nyc": "^13.1.0",
     "clang-format": "1.2.4",
+    "codecov": "^3.1.0",
+    "nyc": "^15.1.0",
     "tape": "^4.4.0"
   },
   "nyc": {