diff --git a/npm_install.py b/npm_install.py
index 73632de..45ca7c8 100644
--- a/npm_install.py
+++ b/npm_install.py
@@ -180,9 +180,9 @@ def write_resolvers_conf(ipv6_enabled: bool):
 
 def validate_nodejs_version(version: str) -> tuple[bool, str, str | None]:
     version_map = {
-        'latest': '22',
-        'lts': '22',
-        'current': '23'
+        'latest': '21',
+        'lts': '18',
+        'current': '21'
     }
     
     resolved = version_map.get(version.lower(), version)
@@ -203,6 +203,67 @@ def validate_nodejs_version(version: str) -> tuple[bool, str, str | None]:
     
     return True, resolved, None
 
+def validate_supported_os():
+    distro_id = OSREL.get('ID', '').lower()
+    version_id = OSREL.get('VERSION_ID', '').strip()
+    
+    SUPPORTED = {
+        'debian': ['11', '12', '13'],
+        'ubuntu': ['20.04', '22.04', '24.04'],
+
+        # Debian derivatives
+        'proxmox': ['7', '8', '9'],
+        'devuan': ['4', '5'],
+        'armbian': ['23.02', '24.02'],
+        'mx': ['21', '23'],
+        'kali': ['2023.1', '2024.1'],
+        'parrot': ['5', '6'],
+
+        # Ubuntu derivatives
+        'pop': ['20.04', '22.04'],
+        'mint': ['20', '21', '22'],
+        'zorin': ['16', '17'],
+        'elementary': ['6', '7'], 
+        'kubuntu': ['20.04', '22.04', '24.04'], 
+        'xubuntu': ['20.04', '22.04', '24.04'],
+        'lubuntu': ['20.04', '22.04', '24.04'], 
+    }
+    
+    if distro_id not in SUPPORTED:
+        print(f"\n⚠ ERROR: Unsupported distribution: {distro_id}")
+        print(f"   Detected: {OSREL.get('PRETTY', 'Unknown')}")
+        print(f"\n   Supported distributions:")
+        print(f"   • Debian 11 (Bullseye), 12 (Bookworm), 13 (Trixie)")
+        print(f"   • Ubuntu 20.04 LTS, 22.04 LTS, 24.04 LTS")
+        print(f"   • Debian derivatives: Proxmox VE, Devuan, MX Linux, Kali, Parrot")
+        print(f"   • Ubuntu derivatives: Linux Mint, Pop!_OS, Zorin, elementary OS")
+        print(f"\n   Your distribution may work but is not officially tested.")
+        print(f"   Continue at your own risk or install on a supported system.\n")
+        sys.exit(1)
+    
+    supported_versions = SUPPORTED[distro_id]
+    version_match = False
+    
+    for supported_ver in supported_versions:
+        if version_id.startswith(supported_ver):
+            version_match = True
+            break
+    
+    if not version_match:
+        print(f"\n⚠  WARNING: Unsupported version of {distro_id}: {version_id}")
+        print(f"   Detected: {OSREL.get('PRETTY', 'Unknown')}")
+        print(f"   Supported versions: {', '.join(supported_versions)}")
+        print(f"\n   This version may work but is not officially tested.")
+        
+        response = input("\n   Continue anyway? [y/N]: ").strip().lower()
+        if response not in ['y', 'yes']:
+            print("\n   Installation cancelled.\n")
+            sys.exit(1)
+        print()
+    else:
+        print(f"✓ Supported OS detected: {OSREL.get('PRETTY', 'Unknown')}\n")
+
+
 def comment_x_served_by_step(path="/etc/angie/conf.d/include/proxy.conf"):
     p = Path(path)
     if not p.exists():
@@ -1686,7 +1747,8 @@ def main():
         update_motd(args.motd == "yes", info, ipv6_enabled=args.enable_ipv6)
         print_summary(info, args.enable_ipv6, args.dark_mode, update_mode=True)
         return
-
+        
+    validate_supported_os()
     apt_update_upgrade()
     apt_purge(["nginx","openresty","nodejs","npm","yarn","certbot","rustc","cargo"])
     apt_install(["ca-certificates","curl","gnupg","openssl","apache2-utils","logrotate","sudo","acl",