diff --git a/README.md b/README.md
index eef4675..25209f1 100644
--- a/README.md
+++ b/README.md
@@ -282,7 +282,8 @@ The list of actions that can be bound is the same as the list of built-in action
 To change the minimum height (before it starts auto-growing):
 
 ```CSS
-.CodeMirror, .CodeMirror-scroll {
+.cm-s-simplemde,
+.cm-s-simplemde .CodeMirror-scroll {
 	min-height: 200px;
 }
 ```
@@ -290,7 +291,7 @@ To change the minimum height (before it starts auto-growing):
 Or, you can keep the height static:
 
 ```CSS
-.CodeMirror {
+.cm-s-simplemde {
 	height: 300px;
 }
 ```