diff --git a/guac-upgrade.sh b/guac-upgrade.sh
index a690894..63734aa 100644
--- a/guac-upgrade.sh
+++ b/guac-upgrade.sh
@@ -1,5 +1,8 @@
 #!/bin/bash
 
+# Check if user is root or sudo
+if ! [ $(id -u) = 0 ]; then echo "Please run this script as sudo or root"; exit 1 ; fi
+
 # Version number of Guacamole to install
 GUACVERSION="0.9.14"