diff --git a/docs/install.md b/docs/install.md
index a3a35f09..e0eac561 100644
--- a/docs/install.md
+++ b/docs/install.md
@@ -10,7 +10,7 @@ yarn add sharp
 
 ### Prerequisites
 
-* Node v4+
+* Node v4.5.0+
 * C++11 compatible compiler such as gcc 4.8+, clang 3.0+ or MSVC 2013+
 * [node-gyp](https://github.com/TooTallNate/node-gyp#installation) and its dependencies (includes Python)
 
diff --git a/package.json b/package.json
index 0660acae..62c4c51e 100644
--- a/package.json
+++ b/package.json
@@ -91,7 +91,7 @@
     "libvips": "8.5.5"
   },
   "engines": {
-    "node": ">=4"
+    "node": ">=4.5.0"
   },
   "semistandard": {
     "env": [