diff --git a/install.sh b/install.sh
index 8bfcf6d..7ab4ca3 100644
--- a/install.sh
+++ b/install.sh
@@ -81,19 +81,19 @@ fi
 
 # Setup prereqs for server
 # common named prereqs
-prereq="curl wget unzip tar"
+PREREQ="curl wget unzip tar"
 echo "Installing prerequisites"
 if [ "${ID}" = "debian" ] || [ "$OS" = "Ubuntu" ] || [ "$OS" = "Debian" ]  || [ "${UPSTREAM_ID}" = "ubuntu" ] || [ "${UPSTREAM_ID}" = "debian" ]; then
-    prereq+=" dnsutils"
+    PREREQ+=" dnsutils"
     sudo apt-get update
-    sudo apt-get install -y  "${prereq}" # git
+    sudo apt-get install -y  "${PREREQ}" # git
 elif [ "$OS" = "CentOS" ] || [ "$OS" = "RedHat" ]   || [ "${UPSTREAM_ID}" = "rhel" ] ; then
 # opensuse 15.4 fails to run the relay service and hangs waiting for it
 # needs more work before it can be enabled
 # || [ "${UPSTREAM_ID}" = "suse" ]
-    prereq+=" bind-utils"
+    PREREQ+=" bind-utils"
     sudo yum update -y
-    sudo yum install -y "${prereq}"   #  git
+    sudo yum install -y "${PREREQ}"   #  git
 else
     echo "Unsupported OS"
     # here you could ask the user for permission to try and install anyway
diff --git a/update.sh b/update.sh
index fcf75cb..a1b5ba7 100644
--- a/update.sh
+++ b/update.sh
@@ -59,16 +59,16 @@ fi
 
 # Setup prereqs for server
 # common named prereqs
-prereq="curl wget unzip tar"
+PREREQ="curl wget unzip tar"
 echo "Installing prerequisites"
 if [ "${ID}" = "debian" ] || [ "$OS" = "Ubuntu" ] || [ "$OS" = "Debian" ]  || [ "${UPSTREAM_ID}" = "ubuntu" ] || [ "${UPSTREAM_ID}" = "debian" ]; then
-    prereq+=" dnsutils"
+    PREREQ+=" dnsutils"
     sudo apt-get update
-    sudo apt-get install -y  "${prereq}" # git
+    sudo apt-get install -y  "${PREREQ}" # git
 elif [ "$OS" = "CentOS" ] || [ "$OS" = "RedHat" ] || [ "${UPSTREAM_ID}" = "rhel" ]; then
-    prereq+=" bind-utils"
+    PREREQ+=" bind-utils"
     sudo yum update -y
-    sudo yum install -y "${prereq}"   #  git
+    sudo yum install -y "${PREREQ}"   #  git
 else
     echo "Unsupported OS"
     # here you could ask the user for permission to try and install anyway