diff --git a/.travis.yml b/.travis.yml
index 7dfc3ae9a..c55edaec1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,6 @@
 sudo: false
 language: node_js
 node_js:
-  - 4
   - 6
   - 8
   - 9
diff --git a/appveyor.yml b/appveyor.yml
index 12f756f1c..c30a4056a 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -2,7 +2,6 @@ version: "{build}"
 
 environment:
   matrix:
-    - nodejs_version: "4"
     - nodejs_version: "6"
     - nodejs_version: "8"
     - nodejs_version: "10"
diff --git a/package.json b/package.json
index f6c1a18ef..933c1192b 100644
--- a/package.json
+++ b/package.json
@@ -373,7 +373,7 @@
     "http-proxy": "^1.13.0",
     "isbinaryfile": "^3.0.0",
     "lodash": "^4.17.4",
-    "log4js": "^2.5.3",
+    "log4js": "^3.0.0",
     "mime": "^1.3.4",
     "minimatch": "^3.0.2",
     "optimist": "^0.6.1",
@@ -459,7 +459,7 @@
     "karma": "./bin/karma"
   },
   "engines": {
-    "node": ">= 4"
+    "node": ">= 6"
   },
   "version": "2.0.5",
   "license": "MIT",