diff --git a/README.md b/README.md
index b4d3f19..374020e 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ Base URL: **https://gitea.linuxiarz.pl/gru/npm-angie-auto-install**
 ---
 
 ## Requirements
-- Debian 12+ / Ubuntu 20.04+
+- Debian 11+ / Ubuntu 20.04+
 - `curl`, `python3`, `sudo`
 - Network access to fetch packages and Node/Yarn artifacts.
 - ~2 GB RAM (recommended) or add 2 GB swap for safer frontend builds.
diff --git a/npm_install.py b/npm_install.py
index 6d12b63..73632de 100644
--- a/npm_install.py
+++ b/npm_install.py
@@ -1618,7 +1618,7 @@ def main():
     global DEBUG
     ensure_root()
     parser = argparse.ArgumentParser(
-        description="Install/upgrade NPM on Angie (Debian/Ubuntu) with step animation.",
+        description="Install/upgrade NPM on Angie (Debian 11 + / Ubuntu 20.04 +).",
         formatter_class=argparse.ArgumentDefaultsHelpFormatter
     )
     parser.add_argument("--nodejs-pkg", default="nodejs", help="APT Node.js package name (e.g. nodejs, nodejs-18).")
@@ -1647,10 +1647,23 @@ def main():
     args = parser.parse_args()
     DEBUG = args.debug
 
-    print("\n================== NPM + ANGIE installer ( https://gitea.linuxiarz.pl/gru/npm-angie-auto-install ) ==================")
-    print("Log mode:", "DEBUG" if DEBUG else "SIMPLE")
-    print(f"Detected OS: {OSREL['PRETTY']}  ({OSREL['ID']} {OSREL['VERSION_ID']})")
-    print("\n@linuxiarz.pl\n")
+    print("\n================== NPM + ANGIE installer ==================")
+    print(f"Repository: https://gitea.linuxiarz.pl/gru/npm-angie-auto-install")
+    print(f"Script description: Auto-installer with Angie + Node.js auto-setup")
+    print(f"")
+    print(f"System Information:")
+    print(f"  OS: {OSREL['PRETTY']}")
+    print(f"  Distribution: {OSREL['ID']} {OSREL['VERSION_ID']}")
+    print(f"  Codename: {OSREL.get('CODENAME', 'N/A')}")
+    print(f"  Python: {sys.version.split()[0]}")
+    print(f"")
+    print(f"Installation Mode:")
+    print(f"  Log Level: {'DEBUG (verbose)' if DEBUG else 'SIMPLE (progress only)'}")
+    print(f"  Min Node.js: v{MIN_NODEJS_VERSION}+ (auto-installed if needed)")
+    print(f"  Max Node.js: v{MAX_NODEJS_VERSION} (tested)")
+    print(f"")
+    print(f"Author: @linuxiarz.pl (Mateusz Gruszczyński)")
+    print("===========================================================\n")
 
     if args.update:
         install_logrotate_for_data_logs()