diff --git a/menu.sh b/menu.sh
index 0bc63e72..b3a58e6c 100644
--- a/menu.sh
+++ b/menu.sh
@@ -416,7 +416,41 @@ edit_ips() {
 }
 
 hysteria_upgrade(){
-    bash <(curl https://raw.githubusercontent.com/ReturnFI/Blitz/main/upgrade.sh)
+    # Check if upgrade is already running
+    if [ -f "/tmp/hysteria_upgrade.lock" ]; then
+        echo -e "${red}Error:${NC} An upgrade process is already running or was interrupted."
+        echo -e "${yellow}Please check the system status and remove /tmp/hysteria_upgrade.lock if needed.${NC}"
+        return 1
+    fi
+
+    # Create lock file to prevent concurrent upgrades
+    echo $$ > /tmp/hysteria_upgrade.lock
+    echo -e "${yellow}Upgrade process started. PID: $$${NC}"
+
+    # Use nohup to continue running even if SSH disconnects
+    # Redirect output to log file for later inspection
+    nohup bash <(curl -s https://raw.githubusercontent.com/ReturnFI/Blitz/main/upgrade.sh) > /var/log/hysteria_upgrade.log 2>&1 &
+
+    UPGRADE_PID=$!
+    echo -e "${green}Upgrade process started in background (PID: $UPGRADE_PID).${NC}"
+    echo -e "${yellow}You can safely disconnect. The upgrade will continue in the background.${NC}"
+    echo -e "${yellow}Check progress with: tail -f /var/log/hysteria_upgrade.log${NC}"
+    echo -e "${yellow}Or check status with: ps aux | grep upgrade.sh${NC}"
+
+    # Wait a moment to let the process start
+    sleep 2
+
+    # Check if the process is still running
+    if ps -p $UPGRADE_PID > /dev/null; then
+        echo -e "${green}Upgrade process is running successfully in the background.${NC}"
+    else
+        echo -e "${red}Error:${NC} Upgrade process failed to start."
+        rm -f /tmp/hysteria_upgrade.lock
+        return 1
+    fi
+
+    # Remove lock file when done (this will be handled by the upgrade script)
+    # The upgrade script should remove the lock file when completed
 }
 
 warp_configure_handler() {
diff --git a/upgrade.sh b/upgrade.sh
index 4ebcf0cf..d453a3f1 100644
--- a/upgrade.sh
+++ b/upgrade.sh
@@ -213,6 +213,17 @@ for SERVICE in "${ALL_SERVICES[@]}"; do
     fi
 done
 
+# ========== Check for existing upgrade process ==========
+if [ -f "/tmp/hysteria_upgrade.lock" ]; then
+    info "Found existing upgrade lock file. This might be from a previous interrupted upgrade."
+    info "Removing lock file to allow this upgrade to proceed..."
+    rm -f /tmp/hysteria_upgrade.lock
+fi
+
+# ========== Create new lock file ==========
+echo $$ > /tmp/hysteria_upgrade.lock
+info "Upgrade process started. PID: $$"
+
 # ========== Check AVX Support Prerequisite ==========
 check_avx_support
 
@@ -356,4 +367,10 @@ fi
 info "Upgrade process finished. Launching menu..."
 cd "$HYSTERIA_INSTALL_DIR"
 chmod +x menu.sh
-./menu.sh
\ No newline at end of file
+
+# ========== Cleanup ==========
+info "Cleaning up upgrade lock file..."
+rm -f /tmp/hysteria_upgrade.lock
+success "Upgrade lock file removed."
+
+./menu.sh