diff --git a/README.md b/README.md
index f357fc9..2b49a1c 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ In the domain of information visualization, physical simulations are useful for
 
 [<img alt="Force Dragging III" src="https://raw.githubusercontent.com/d3/d3-force/master/img/graph.png" width="420" height="219">](http://bl.ocks.org/mbostock/ad70335eeef6d167bc36fd3c04378048)[<img alt="Force-Directed Tree" src="https://raw.githubusercontent.com/d3/d3-force/master/img/tree.png" width="420" height="219">](http://bl.ocks.org/mbostock/95aa92e2f4e8345aaa55a4a94d41ce37)
 
-You can also simulate circles (disks) with collision, such as for [bubble charts](http://www.nytimes.com/interactive/2012/09/06/us/politics/convention-word-counts.html) or [beeswam plots](http://bl.ocks.org/mbostock/6526445e2b44303eebf21da3b6627320):
+You can also simulate circles (disks) with collision, such as for [bubble charts](http://www.nytimes.com/interactive/2012/09/06/us/politics/convention-word-counts.html) or [beeswarm plots](http://bl.ocks.org/mbostock/6526445e2b44303eebf21da3b6627320):
 
 [<img alt="Collision Detection" src="https://raw.githubusercontent.com/d3/d3-force/master/img/collide.png" width="420" height="219">](http://bl.ocks.org/mbostock/31ce330646fa8bcb7289ff3b97aab3f5)[<img alt="Beeswarm" src="https://raw.githubusercontent.com/d3/d3-force/master/img/beeswarm.png" width="420" height="219">](http://bl.ocks.org/mbostock/6526445e2b44303eebf21da3b6627320)