diff --git a/wireguard-install.sh b/wireguard-install.sh
index c178027..c194cf7 100644
--- a/wireguard-install.sh
+++ b/wireguard-install.sh
@@ -46,10 +46,16 @@ This version of Ubuntu is too old and unsupported."
 	exit
 fi
 
-if [[ "$os" == "debian" && "$os_version" -lt 10 ]]; then
-	echo "Debian 10 or higher is required to use this installer.
+if [[ "$os" == "debian" ]]; then
+	if grep -q '/sid' /etc/debian_version; then
+		echo "Debian Testing and Debian Unstable are unsupported by this installer."
+		exit
+	fi
+	if [[ "$os_version" -lt 10 ]]; then
+		echo "Debian 10 or higher is required to use this installer.
 This version of Debian is too old and unsupported."
-	exit
+		exit
+	fi
 fi
 
 if [[ "$os" == "centos" && "$os_version" -lt 7 ]]; then