diff --git a/README.md b/README.md
index d93a6a8..3c56ef2 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ Example usage:
 Limit CPU of all currently running browser processes to 1%, but do not
 watch for new processes.
 
-```
+```usage
 Usage: ./cpulimit-all.sh [TARGET] [OPTIONS...] [-- PROGRAM]
    TARGET may be one or more of these (either TARGET or PROGRAM is required):
       -p, --pid=N        pid of a process