diff --git a/update.sh b/update.sh
index 93c5eb7..15e4eeb 100644
--- a/update.sh
+++ b/update.sh
@@ -14,7 +14,7 @@ fi
 
 # get OS ditro and version
 OS=$(hostnamectl | awk '/Operating System/ {print $3}')
-VM=true 
+VM='true '
 if [ ${OS} == 'Ubuntu' ]; then
 	OS_VER=$(hostnamectl | awk '/Operating System/ {print $4}')
 else
@@ -22,7 +22,7 @@ else
 fi
 
 if [ $(hostnamectl | awk '/Virtualization/ {print $2}') == 'vmware' ]; then
-	VM=false
+	VM='false'
 
 # Debian OS
 if [ ${OS} == 'Debian' ] || [ ${OS} == 'Ubuntu' ]; then
@@ -45,7 +45,7 @@ if [ ${OS} == 'Debian' ] || [ ${OS} == 'Ubuntu' ]; then
     apt install -y pbis-open sudo nano htop nload iperf iperf3 unattended-upgrades unzip git nfs-common uptimed net-tools build-essential curl
     
     # install vm tools
-    if [ ${VM} == true ]; then
+    if [ ${VM} == 'true' ]; then
     	apt install open-vm-tools
     
     # remove unneeded packages
@@ -82,7 +82,7 @@ elif [ ${OS} == 'CentOS' ]; then
       yum install -y pbis-open sudo nano htop nload iperf iperf3 bind-utils yum-cron unzip nfs-utils git wget uptimed net-tools make
 
 	  # install vm tools
-      if [ ${VM} == true ]; then
+      if [ ${VM} == 'true' ]; then
            yum install open-vm-tools
       
       # modify yum-cron config to auto install security updates and enable/start the service 
@@ -103,7 +103,7 @@ elif [ ${OS} == 'CentOS' ]; then
       	dnf install -y pbis-open sudo nano htop iperf3 bind-utilsunzip nfs-utils git wget net-tools make
         
         # install vm tools
-        if [ ${VM} == true ]; then
+        if [ ${VM} == 'true' ]; then
            dnf install open-vm-tools
     
         # https://github.com/BeyondTrust/pbis-open/issues/242