diff --git a/README.md b/README.md
index 611812a..704fb89 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ sudo apt update
 sudo apt -y -t buster-backports install freerdp2-dev libpulse-dev
 ```
 
-Script for installing Guacamole 1.5.1 on Ubuntu 16.04 or newer (with MySQL, or remote MySQL). It should also work on pure [Debian](https://www.debian.org/), [Raspbian](https://www.raspberrypi.org/downloads/raspbian/), [Linux Mint](https://linuxmint.com/) (18/LMDE 4 or newer) or [Kali Linux](https://www.kali.org/). I have tested this with Debian 10.3.0 (Buster). **If other versions don't work please open an issue.** It is likely due to a required library having a different name.
+Script for installing Guacamole 1.5.3 on Ubuntu 16.04 or newer (with MySQL, or remote MySQL). It should also work on pure [Debian](https://www.debian.org/), [Raspbian](https://www.raspberrypi.org/downloads/raspbian/), [Linux Mint](https://linuxmint.com/) (18/LMDE 4 or newer) or [Kali Linux](https://www.kali.org/). I have tested this with Debian 10.3.0 (Buster). **If other versions don't work please open an issue.** It is likely due to a required library having a different name.
 
 Run script, enter MySQL Root Password and Guacamole User password. Guacamole User is used to connect to the Guacamole Database. Be sure to save these!
 
@@ -119,8 +119,7 @@ NOTE: Only the switches for MySQL Host, MySQL Port and Guacamole Database are av
 
 ## WARNING
 
-- Upgrading from 0.9.14 or 1.1.0 to 1.5.1 has not been tested, only 1.4.0 to 1.5.1 has been tested using the upgrade script!
-- Switches have changed and additional ones have been added!
+- Upgrading from versions older than a couple dot fixes ago have not been tested with this script, use at your own risk and take backups first!
 
 ## How to Upgrade:
 
diff --git a/docker-install.sh b/docker-install.sh
index 540c4eb..d53e92b 100755
--- a/docker-install.sh
+++ b/docker-install.sh
@@ -4,7 +4,7 @@
 if ! [ $(id -u) = 0 ]; then echo "Please run this script as sudo or root"; exit 1 ; fi
 
 # Version number of Guacamole to install
-GUACVERSION="1.5.1"
+GUACVERSION="1.5.3"
 
 # Initialize variable values
 installTOTP=""
diff --git a/guac-install-server.sh b/guac-install-server.sh
index 2b29ae3..f110b89 100755
--- a/guac-install-server.sh
+++ b/guac-install-server.sh
@@ -4,7 +4,7 @@
 if ! [ $(id -u) = 0 ]; then echo "Please run this script as sudo or root"; exit 1 ; fi
 
 # Version number of Guacamole to install
-GUACVERSION="1.5.1"
+GUACVERSION="1.5.3"
 
 # Different version of Ubuntu/Linux Mint and Debian have different package names...
 source /etc/os-release
diff --git a/guac-install.sh b/guac-install.sh
index 246ec0b..d2ca2f7 100755
--- a/guac-install.sh
+++ b/guac-install.sh
@@ -15,7 +15,7 @@ fi
 
 # Version number of Guacamole to install
 # Homepage ~ https://guacamole.apache.org/releases/
-GUACVERSION="1.5.1"
+GUACVERSION="1.5.3"
 
 # Latest Version of MySQL Connector/J if manual install is required (if libmariadb-java/libmysql-java is not available via apt)
 # Homepage ~ https://dev.mysql.com/downloads/connector/j/
diff --git a/guac-upgrade.sh b/guac-upgrade.sh
index 044e62e..2bf79c0 100755
--- a/guac-upgrade.sh
+++ b/guac-upgrade.sh
@@ -4,7 +4,7 @@
 if ! [ $(id -u) = 0 ]; then echo "Please run this script as sudo or root"; exit 1 ; fi
 
 # Version number of Guacamole to install
-GUACVERSION="1.5.1"
+GUACVERSION="1.5.3"
 
 # Colors to use for output
 YELLOW='\033[1;33m'