diff --git a/debian/bb-wl18xx-tether b/debian/bb-wl18xx-tether
index d70832c..5c7a741 100755
--- a/debian/bb-wl18xx-tether
+++ b/debian/bb-wl18xx-tether
@@ -1,4 +1,4 @@
-#!/bin/bash -e
+#!/bin/sh -e
 #
 # Copyright (c) 2016-2020 Robert Nelson <robertcnelson@gmail.com>
 #
diff --git a/debian/bb-wl18xx-wlan0 b/debian/bb-wl18xx-wlan0
index 929673c..1b05bb2 100755
--- a/debian/bb-wl18xx-wlan0
+++ b/debian/bb-wl18xx-wlan0
@@ -1,4 +1,4 @@
-#!/bin/bash -e
+#!/bin/sh -e
 #
 # Copyright (c) 2016-2020 Robert Nelson <robertcnelson@gmail.com>
 #
@@ -52,9 +52,7 @@ cylon_leds () {
 				STATE=2
 				;;
 			esac
-			#bashsism...
-			#possible bashism in bb-wl18xx-wlan0 line 45 (sleep only takes one integer):
-			sleep 0.1
+			/bin/sleep 0.1
 		done
 	fi
 }