diff --git a/Brewfile b/Brewfile
index b7c1748..0403060 100755
--- a/Brewfile
+++ b/Brewfile
@@ -17,6 +17,7 @@ install findutils
 # Install GNU `sed`, overwriting the built-in `sed`
 install gnu-sed --default-names
 # Install Bash 4
+# Note: don’t forget to add `/usr/local/bin/bash` to `/etc/shells` before running `chsh`.
 install bash
 install bash-completion