diff --git a/package.json b/package.json
index 3bcdc242..f4478324 100644
--- a/package.json
+++ b/package.json
@@ -38,13 +38,13 @@
     "browserify": "^16.2.3",
     "coveralls": "^3.0.2",
     "istanbul": "^0.4.5",
-    "karma": "^3.1.4",
+    "karma": "^5.0.0",
     "karma-browserify": "^6.0.0",
     "karma-chrome-launcher": "^2.2.0",
     "karma-mocha": "^1.3.0",
     "mocha": "^5.2.0",
     "mocha-lcov-reporter": "^1.2.0",
-    "xo": "^0.23.0"
+    "xo": "^0.42.0"
   },
   "peerDependenciesMeta": {
     "supports-color": {