diff --git a/services/comms/scripts/element-host-config.sh b/services/comms/scripts/element-host-config.sh
index 6f381a9..1c6a488 100644
--- a/services/comms/scripts/element-host-config.sh
+++ b/services/comms/scripts/element-host-config.sh
@@ -1,9 +1,9 @@
-#!/usr/bin/env bash
-set -euo pipefail
+#!/bin/sh
+set -eu
 
 HOST_CONFIG="/tmp/element-web-config/config.live.bstein.dev.json"
 BASE_CONFIG="/tmp/element-web-config/config.json"
 
-if [[ -f "$BASE_CONFIG" ]]; then
+if [ -f "$BASE_CONFIG" ]; then
   cp -f "$BASE_CONFIG" "$HOST_CONFIG"
 fi