Update README.md

Shellcheck: better to use pgrep instead of grepping ps output

1 files changed, 1 insertions, 1 deletions

diff --git a/README.md b/README.md
index 573316a..5e7c3c8 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ If a class isn't available (such as with xev) then the command of origin can be
 Place bspswallow into your PATH and add the following line to your bspwmrc.
 
 ```
-(ps x | grep bspswallow | grep -v grep) || bspswallow &
+pgrep bspswallow || bspswallow &
 ```
 
 Now just restart bspwm and you're good to go.