diff --git a/extras/quickstart.sh b/extras/quickstart.sh
index 5f5b1b8..b3f1e1a 100755
--- a/extras/quickstart.sh
+++ b/extras/quickstart.sh
@@ -93,6 +93,8 @@ check_os() {
   elif grep -qs "Amazon Linux release 2 " /etc/system-release; then
     os_type=amzn
     os_ver=2
+  elif grep -qs "Amazon Linux release 2023" /etc/system-release; then
+    exiterr "Amazon Linux 2023 is not supported."
   else
     os_type=$(lsb_release -si 2>/dev/null)
     [ -z "$os_type" ] && [ -f /etc/os-release ] && os_type=$(. /etc/os-release && printf '%s' "$ID")
diff --git a/vpnsetup.sh b/vpnsetup.sh
index 5f5b1b8..b3f1e1a 100755
--- a/vpnsetup.sh
+++ b/vpnsetup.sh
@@ -93,6 +93,8 @@ check_os() {
   elif grep -qs "Amazon Linux release 2 " /etc/system-release; then
     os_type=amzn
     os_ver=2
+  elif grep -qs "Amazon Linux release 2023" /etc/system-release; then
+    exiterr "Amazon Linux 2023 is not supported."
   else
     os_type=$(lsb_release -si 2>/dev/null)
     [ -z "$os_type" ] && [ -f /etc/os-release ] && os_type=$(. /etc/os-release && printf '%s' "$ID")
diff --git a/vpnsetup_amzn.sh b/vpnsetup_amzn.sh
index 5e602da..3879329 100755
--- a/vpnsetup_amzn.sh
+++ b/vpnsetup_amzn.sh
@@ -54,7 +54,11 @@ check_root() {
 
 check_os() {
   if ! grep -qs "Amazon Linux release 2 " /etc/system-release; then
-    exiterr "This script only supports Amazon Linux 2."
+    if grep -qs "Amazon Linux release 2023" /etc/system-release; then
+      exiterr "Amazon Linux 2023 is not supported."
+    else
+      exiterr "This script only supports Amazon Linux 2."
+    fi
   fi
 }