diff --git a/layouts/window-wide-left b/layouts/window-wide-left
index d5e6f16..1e9a120 100755
--- a/layouts/window-wide-left
+++ b/layouts/window-wide-left
@@ -1,4 +1,4 @@
-#!/usr/bin/env sh
+#!/usr/bin/env bash
 
 cols=`tmux display -p "#{pane_width}"`
 
diff --git a/layouts/window-wide-right b/layouts/window-wide-right
index 6e50790..9d7409f 100755
--- a/layouts/window-wide-right
+++ b/layouts/window-wide-right
@@ -1,4 +1,4 @@
-#!/usr/bin/env sh
+#!/usr/bin/env bash
 
 cols=`tmux display -p "#{pane_width}"`