diff --git a/packages/action/entrypoint.sh b/packages/action/entrypoint.sh
index 8a5d3e7..a21c1f9 100644
--- a/packages/action/entrypoint.sh
+++ b/packages/action/entrypoint.sh
@@ -1,25 +1,25 @@
-#!/bin/bash
+#!/bin/sh
 
 set -e
 
 # Set environment variables by stripping "key=" and keeping only the value
-export STORAGE_BUCKET=${1#*=}
-export WEBSITE_ID=${2#*=}
-export WEBSITE_EXPIRES=${3#*=}
-export KEEP_HISTORY=${4#*=}
-export KEEP_RESULTS=${5#*=}
-export SLACK_CHANNEL_ID=${6#*=}
-export ALLURE_RESULTS_PATH=${7#*=}
-export SHOW_RETRIES=${8#*=}
-export SHOW_HISTORY=${9#*=}
-
-
-if [[ -z "$WEBSITE_ID" ]] && [[ -z "$STORAGE_BUCKET" ]]; then
+export STORAGE_BUCKET="${1#*=}"
+export WEBSITE_ID="${2#*=}"
+export WEBSITE_EXPIRES="${3#*=}"
+export KEEP_HISTORY="${4#*=}"
+export KEEP_RESULTS="${5#*=}"
+export SLACK_CHANNEL_ID="${6#*=}"
+export ALLURE_RESULTS_PATH="${7#*=}"
+export SHOW_RETRIES="${8#*=}"
+export SHOW_HISTORY="${9#*=}"
+
+
+if [ -z "$WEBSITE_ID" ] && [ -z "$STORAGE_BUCKET" ]; then
     echo "Error: Either website_id or storage_bucket must be set" >&2
     exit 1
 fi
 
-if [[ -z "$GOOGLE_CREDENTIALS_JSON" ]]; then
+if [ -z "$GOOGLE_CREDENTIALS_JSON" ]; then
   echo "Provide a valid Firebase GCP JSON "
   exit 1
 else