diff --git a/README.md b/README.md
index 65e0a77..441ccf3 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ https://serverok.in/squid
 Auto install Squid 3 proxy on following linux OS.
 
 * Ubuntu 24.04, 22.04, 20.04, 18.04 
-* Debian 12, 11, 10, 9, 8
+* Debian 13, 12, 11, 10, 9, 8
 * CentOS 8
 * CentOS Steam 9, 8
 * AlmaLinux 9, 8
diff --git a/sok-find-os.sh b/sok-find-os.sh
index f8f49c4..142a812 100755
--- a/sok-find-os.sh
+++ b/sok-find-os.sh
@@ -32,6 +32,8 @@ elif cat /etc/os-release | grep PRETTY_NAME | grep "bullseye" > /dev/null; then
     echo "debian11"
 elif cat /etc/os-release | grep PRETTY_NAME | grep "bookworm" > /dev/null; then
     echo "debian12"
+elif cat /etc/os-release | grep PRETTY_NAME | grep "trixie" > /dev/null; then
+    echo "debian13"
 elif cat /etc/os-release | grep PRETTY_NAME | grep "CentOS Linux 7" > /dev/null; then
     echo "centos7"
 elif cat /etc/os-release | grep PRETTY_NAME | grep "CentOS Linux 8" > /dev/null; then
diff --git a/squid3-install.sh b/squid3-install.sh
index 0d69588..e311645 100644
--- a/squid3-install.sh
+++ b/squid3-install.sh
@@ -179,6 +179,18 @@ elif [ $SOK_OS == "debian12" ]; then
     fi
     systemctl enable squid
     systemctl restart squid
+elif [ $SOK_OS == "debian13" ]; then
+    # OS = Debian GNU/Linux 12 (bookworm)
+    /bin/rm -rf /etc/squid
+    /usr/bin/apt update > /dev/null 2>&1
+    /usr/bin/apt -y install apache2-utils squid  > /dev/null 2>&1
+    touch /etc/squid/passwd
+    /usr/bin/wget -q --no-check-certificate -O /etc/squid/conf.d/serverok.conf https://raw.githubusercontent.com/serverok/squid-proxy-installer/master/conf/debian12.conf
+    if [ -f /sbin/iptables ]; then
+        /sbin/iptables -I INPUT -p tcp --dport 3128 -j ACCEPT
+    fi
+    systemctl enable squid
+    systemctl restart squid
 elif [ $SOK_OS == "centos7" ]; then
     echo "CentOS Linux 7 reached End of Life (EOL) nn June 30, 2024. Please use to newer OS"
     exit 1