diff --git a/package.json b/package.json
index 5761b2a..c78fbb1 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "sinon": "3.2.1",
     "sinon-chrome": "2.2.1",
     "npm-run-all": "4.1.1",
-    "selenium-webdriver": "3.5.0",
+    "selenium-webdriver": "4.0.0-alpha.1",
     "virtualenv": "0.3.1",
     "web-ext": "2.0.0"
   },