diff --git a/README.md b/README.md
index ab3000f..e7514ba 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@ Features
     - [x] Free Wildcard SSL
     - [x] Multiple domain support (up to 100 altnames per SAN)
     - [x] Dynamic Virtual Hosting (vhost)
-    - [x] Automatical renewal (10 to 14 days before expiration)
+    - [x] Automatical renewal (30 to 21 days before expiration)
   - [x] Great ACME support via [acme.js](https://git.coolaj86.com/coolaj86/acme-v2.js)
     - [x] "dry run" with self-diagnostics
     - [x] ACME draft 12
@@ -394,8 +394,8 @@ greenlock = Greenlock.create({
 //, sni: require('le-sni-auto').create({})                // handles sni callback
 
                                                           // renewals happen at a random time within this window
-, renewWithin: 14 * 24 * 60 * 60 * 1000                   // certificate renewal may begin at this time
-, renewBy:     10 * 24 * 60 * 60 * 1000                   // certificate renewal should happen by this time
+, renewWithin: 30 * 24 * 60 * 60 * 1000                   // certificate renewal may begin at this time
+, renewBy:     21 * 24 * 60 * 60 * 1000                   // certificate renewal should happen by this time
 
 , debug: false
 //, log: function (debug) {console.log.apply(console, args);} // handles debug outputs
@@ -540,7 +540,7 @@ Change History
   * v2.2.7 - bugfix for wildcard support
   * v2.2.5 - node v6.x compat
   * v2.2.4 - don't promisify all of `dns`
-  * v2.2.3 - `renewWithin` default to 14 days
+  * v2.2.3 - `renewWithin` default to 30 days
   * v2.2.2 - replace git dependency with npm
   * v2.2.1 - April 2018 **Let's Encrypt v2** support
 * v2.1.17 - Nov 5th 2017 migrate back to personal repo
diff --git a/index.js b/index.js
index bfb95bd..5e233d9 100644
--- a/index.js
+++ b/index.js
@@ -133,7 +133,7 @@ Greenlock.create = function (gl) {
     agreeCb(new Error("'agreeToTerms' was not supplied to Greenlock and 'agreeTos' was not supplied to Greenlock.register"));
   };
 
-  if (!gl.renewWithin) { gl.renewWithin = 14 * DAY; }
+  if (!gl.renewWithin) { gl.renewWithin = 30 * DAY; }
   // renewBy has a default in le-sni-auto
 
 
diff --git a/package.json b/package.json
index f2af943..dc2bcaf 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "greenlock",
-  "version": "2.4.9",
+  "version": "2.4.10",
   "description": "Let's Encrypt for node.js on npm",
   "main": "index.js",
   "files": [