diff --git a/README.md b/README.md
index 236470c..44a277f 100644
--- a/README.md
+++ b/README.md
@@ -6,3 +6,17 @@ Using this for YSF and DMR+.
 
 ![an example screenshot](example.png)
 
+## Creating `dash.min.css` from `dash.css`
+
+I use yui-compressor for this.
+
+```shell
+yui-compressor dash.css > dash.min.css
+```
+
+### Install yui-compressor on a Raspberry Pi
+
+```shell
+sudo apt install yui-compressor
+```
+