diff --git a/README.md b/README.md
index 38af769a..aa3d7878 100644
--- a/README.md
+++ b/README.md
@@ -403,7 +403,7 @@
const name = 'Capt. Janeway';
```
- - [6.2](#6.2) Strings longer than 80 characters should be written across multiple lines using string concatenation.
+ - [6.2](#6.2) Strings longer than 100 characters should be written across multiple lines using string concatenation.
- [6.3](#6.3) Note: If overused, long strings with concatenation could impact performance. [jsPerf](http://jsperf.com/ya-string-concat) & [Discussion](https://github.com/airbnb/javascript/issues/40).
```javascript
diff --git a/es5/README.md b/es5/README.md
index fcab6035..f961d8e0 100644
--- a/es5/README.md
+++ b/es5/README.md
@@ -194,7 +194,7 @@
var fullName = 'Bob ' + this.lastName;
```
- - Strings longer than 80 characters should be written across multiple lines using string concatenation.
+ - Strings longer than 100 characters should be written across multiple lines using string concatenation.
- Note: If overused, long strings with concatenation could impact performance. [jsPerf](http://jsperf.com/ya-string-concat) & [Discussion](https://github.com/airbnb/javascript/issues/40).
```javascript