diff --git a/home/user/.tmux/sandbox b/home/user/.tmux/sandbox
index e37a582..f9a287b 100755
--- a/home/user/.tmux/sandbox
+++ b/home/user/.tmux/sandbox
@@ -4,7 +4,7 @@ set -eux
 
 
 random() {
-    seq 0 65535 | shuf | head -n 1
+    shuf -i 0-32767 -n 1
 }
 
 readonly SESSION_PREFIX="sandbox"