diff --git a/update-dockerhub-description.sh b/update-dockerhub-description.sh
index 29be989..e4e46a8 100755
--- a/update-dockerhub-description.sh
+++ b/update-dockerhub-description.sh
@@ -1,4 +1,4 @@
-#!/bin/sh -l
+#!/bin/bash
 
 # This script is licensed under MIT and was originally written by Peter Evans. You can find a copy of the MIT license next to this file.
 # The original file is available on his Github repo under the following link:
@@ -11,23 +11,24 @@ IFS=$'\n\t'
 README_FILEPATH=${README_FILEPATH:="./README.md"}
 
 # Check the file size
-if [ $(wc -c <${README_FILEPATH}) -gt 25000 ]; then
+if [[ $(wc -c <${README_FILEPATH}) -gt 25000 ]]; then
   echo "File size exceeds the maximum allowed 25000 bytes"
   exit 1
 fi
 
 # Acquire a token for the Docker Hub API
 echo "Acquiring token"
+# shellcheck disable=2089
 LOGIN_PAYLOAD="{\"username\": \"${DOCKERHUB_USERNAME}\", \"password\": \"${DOCKERHUB_PASSWORD}\"}"
-TOKEN=$(curl -s -H "Content-Type: application/json" -X POST -d ${LOGIN_PAYLOAD} https://hub.docker.com/v2/users/login/ | jq -r .token)
+TOKEN=$(curl -s -H "Content-Type: application/json" -X POST -d "${LOGIN_PAYLOAD}" https://hub.docker.com/v2/users/login/ | jq -r .token)
 
 # Send a PATCH request to update the description of the repository
 echo "Sending PATCH request"
 REPO_URL="https://hub.docker.com/v2/repositories/${DOCKERHUB_REPOSITORY}/"
-RESPONSE_CODE=$(curl -s --write-out %{response_code} --output /dev/null -H "Authorization: JWT ${TOKEN}" -X PATCH --data-urlencode full_description@${README_FILEPATH} ${REPO_URL})
+RESPONSE_CODE=$(curl -s --write-out "%{response_code}" --output /dev/null -H "Authorization: JWT ${TOKEN}" -X PATCH --data-urlencode full_description@${README_FILEPATH} "${REPO_URL}")
 echo "Received response code: $RESPONSE_CODE"
 
-if [ $RESPONSE_CODE -eq 200 ]; then
+if [[ $RESPONSE_CODE -eq 200 ]]; then
   exit 0
 else
   exit 1