diff --git a/scripts/install.sh b/scripts/install.sh
index 69a7a3eb0..471f640ed 100644
--- a/scripts/install.sh
+++ b/scripts/install.sh
@@ -9,8 +9,8 @@ VERSION="1.1.0"
 DOCKER_VERSION="24.0"
 
 CDN="https://cdn.coollabs.io/coolify"
-OS_TYPE=$(cat /etc/os-release | grep -w "ID" | cut -d "=" -f 2 | tr -d '"')
-OS_VERSION=$(cat /etc/os-release | grep -w "VERSION_ID" | cut -d "=" -f 2 | tr -d '"')
+OS_TYPE=$(grep -w "ID" /etc/os-release | cut -d "=" -f 2 | tr -d '"')
+OS_VERSION=$(grep -w "VERSION_ID" /etc/os-release | cut -d "=" -f 2 | tr -d '"')
 LATEST_VERSION=$(curl --silent $CDN/versions.json | grep -i version | sed -n '2p' | xargs | awk '{print $2}' | tr -d ',')
 DATE=$(date +"%Y%m%d-%H%M%S")
 
@@ -30,6 +30,8 @@ esac
 # Ovewrite LATEST_VERSION if user pass a version number
 if [ "$1" != "" ]; then
     LATEST_VERSION=$1
+    LATEST_VERSION="${LATEST_VERSION,,}"
+    LATEST_VERSION="${LATEST_VERSION#v}"
 fi
 
 echo -e "-------------"
@@ -83,8 +85,8 @@ fi
 echo -e "-------------"
 echo -e "Check Docker Configuration..."
 mkdir -p /etc/docker
-
-test -s /etc/docker/daemon.json && cp /etc/docker/daemon.json /etc/docker/daemon.json.original-$DATE || cat >/etc/docker/daemon.json <<EOL
+# shellcheck disable=SC2015
+test -s /etc/docker/daemon.json && cp /etc/docker/daemon.json /etc/docker/daemon.json.original-"$DATE" || cat >/etc/docker/daemon.json <<EOL
 {
   "log-driver": "json-file",
   "log-opts": {
@@ -102,11 +104,15 @@ cat >/etc/docker/daemon.json.coolify <<EOL
   }
 }
 EOL
-cat <<<$(jq . /etc/docker/daemon.json.coolify) >/etc/docker/daemon.json.coolify
-cat <<<$(jq -s '.[0] * .[1]' /etc/docker/daemon.json /etc/docker/daemon.json.coolify) >/etc/docker/daemon.json
+TEMP_FILE=$(mktemp)
+if ! jq -s '.[0] * .[1]' /etc/docker/daemon.json /etc/docker/daemon.json.coolify > "$TEMP_FILE"; then
+ echo "Error merging JSON files"
+ exit 1
+fi
+mv "$TEMP_FILE" /etc/docker/daemon.json
 
-if [ -s /etc/docker/daemon.json.original-$DATE ]; then
-    DIFF=$(diff <(jq --sort-keys . /etc/docker/daemon.json) <(jq --sort-keys . /etc/docker/daemon.json.original-$DATE))
+if [ -s /etc/docker/daemon.json.original-"$DATE" ]; then
+    DIFF=$(diff <(jq --sort-keys . /etc/docker/daemon.json) <(jq --sort-keys . /etc/docker/daemon.json.original-"$DATE"))
     if [ "$DIFF" != "" ]; then
         echo "Docker configuration updated, restart docker daemon..."
         systemctl restart docker
@@ -167,11 +173,11 @@ if [ ! -f ~/.ssh/authorized_keys ]; then
     addSshKey
 fi
 
-if [ -z "$(grep -w "root@coolify" ~/.ssh/authorized_keys)" ]; then
+if ! grep -qw "root@coolify" ~/.ssh/authorized_keys; then
     addSshKey
 fi
 
-bash /data/coolify/source/upgrade.sh ${LATEST_VERSION:-latest}
+bash /data/coolify/source/upgrade.sh "${LATEST_VERSION:-latest}"
 
 echo -e "\nCongratulations! Your Coolify instance is ready to use.\n"
 echo "Please visit http://$(curl -4s https://ifconfig.io):8000 to get started."