diff --git a/rpi/BUILD_IMAGE.md b/rpi/BUILD_IMAGE.md
index 9c77d7c..869662a 100644
--- a/rpi/BUILD_IMAGE.md
+++ b/rpi/BUILD_IMAGE.md
@@ -24,7 +24,7 @@ ssh admin@stegasoo.local
 
 ```bash
 # Download and run (avoid curl|bash stdin issues)
-wget -O setup.sh https://raw.githubusercontent.com/adlee-was-taken/stegasoo/main/rpi/setup.sh
+wget -O setup.sh https://raw.githubusercontent.com/adlee-was-taken/stegasoo/4.1/rpi/setup.sh
 chmod +x setup.sh
 ./setup.sh
 ```
@@ -105,7 +105,7 @@ zstdcat stegasoo-rpi-*.img.zst | sudo dd of=/dev/sdX bs=4M status=progress
 
 ```bash
 # On Pi:
-wget -O setup.sh https://raw.githubusercontent.com/adlee-was-taken/stegasoo/main/rpi/setup.sh && chmod +x setup.sh && ./setup.sh
+wget -O setup.sh https://raw.githubusercontent.com/adlee-was-taken/stegasoo/4.1/rpi/setup.sh && chmod +x setup.sh && ./setup.sh
 sudo systemctl start stegasoo
 curl -k https://localhost:5000
 sudo ~/stegasoo/rpi/sanitize-for-image.sh
diff --git a/rpi/README.md b/rpi/README.md
index 86ae036..fb9479b 100644
--- a/rpi/README.md
+++ b/rpi/README.md
@@ -8,7 +8,7 @@ On a fresh Raspberry Pi OS Lite (64-bit) installation:
 
 ```bash
 # Download and run (recommended)
-wget -O setup.sh https://raw.githubusercontent.com/adlee-was-taken/stegasoo/main/rpi/setup.sh
+wget -O setup.sh https://raw.githubusercontent.com/adlee-was-taken/stegasoo/4.1/rpi/setup.sh
 chmod +x setup.sh
 ./setup.sh
 ```
@@ -16,7 +16,7 @@ chmod +x setup.sh
 Or clone the repo:
 
 ```bash
-git clone https://github.com/adlee-was-taken/stegasoo.git
+git clone -b 4.1 https://github.com/adlee-was-taken/stegasoo.git
 cd stegasoo/rpi
 ./setup.sh
 ```
@@ -134,7 +134,7 @@ In advanced settings, set:
 ssh admin@stegasoo.local
 
 # Download and run setup script
-wget -O setup.sh https://raw.githubusercontent.com/adlee-was-taken/stegasoo/main/rpi/setup.sh
+wget -O setup.sh https://raw.githubusercontent.com/adlee-was-taken/stegasoo/4.1/rpi/setup.sh
 chmod +x setup.sh
 ./setup.sh
 ```
diff --git a/rpi/setup.sh b/rpi/setup.sh
index 07161e4..3244c4c 100755
--- a/rpi/setup.sh
+++ b/rpi/setup.sh
@@ -4,9 +4,9 @@
 # Tested on: Raspberry Pi 4/5 with Raspberry Pi OS (64-bit)
 #
 # Usage:
-#   curl -sSL https://raw.githubusercontent.com/adlee-was-taken/stegasoo/main/rpi/setup.sh | bash
+#   curl -sSL https://raw.githubusercontent.com/adlee-was-taken/stegasoo/4.1/rpi/setup.sh | bash
 #   # or
-#   wget -qO- https://raw.githubusercontent.com/adlee-was-taken/stegasoo/main/rpi/setup.sh | bash
+#   wget -qO- https://raw.githubusercontent.com/adlee-was-taken/stegasoo/4.1/rpi/setup.sh | bash
 #
 # What this script does:
 #   1. Installs system dependencies
@@ -48,7 +48,7 @@ show_help() {
     echo "    INSTALL_DIR       Install location (default: /opt/stegasoo)"
     echo "    PYTHON_VERSION    Python version (default: 3.12)"
     echo "    STEGASOO_REPO     Git repo URL"
-    echo "    STEGASOO_BRANCH   Git branch (default: main)"
+    echo "    STEGASOO_BRANCH   Git branch (default: 4.1)"
     echo ""
     echo "  Example:"
     echo "    export INSTALL_DIR=\"/home/pi/stegasoo\""
@@ -68,7 +68,7 @@ done
 INSTALL_DIR="${INSTALL_DIR:-/opt/stegasoo}"
 PYTHON_VERSION="${PYTHON_VERSION:-3.12}"
 STEGASOO_REPO="${STEGASOO_REPO:-https://github.com/adlee-was-taken/stegasoo.git}"
-STEGASOO_BRANCH="${STEGASOO_BRANCH:-main}"
+STEGASOO_BRANCH="${STEGASOO_BRANCH:-4.1}"
 JPEGIO_REPO="https://github.com/dwgoon/jpegio.git"
 
 # Load config files (system, then user - user overrides system)
diff --git a/rpi/stegasoo.conf.example b/rpi/stegasoo.conf.example
index f7d0402..9612349 100644
--- a/rpi/stegasoo.conf.example
+++ b/rpi/stegasoo.conf.example
@@ -14,8 +14,8 @@
 # Git repository URL
 #STEGASOO_REPO="https://github.com/adlee-was-taken/stegasoo.git"
 
-# Git branch to checkout (default: main)
-#STEGASOO_BRANCH="main"
+# Git branch to checkout (default: 4.1)
+#STEGASOO_BRANCH="4.1"
 
 # Web UI port (default: 5000)
 #STEGASOO_PORT="5000"