diff --git a/bin/srv.py b/bin/srv.py
index 22f1a2e..f1bdfae 100644
--- a/bin/srv.py
+++ b/bin/srv.py
@@ -49,7 +49,7 @@ def is_html_needed(user_agent):
     Basing on `user_agent`, return whether it needs HTML or ANSI
     """
     plaintext_clients = ['curl', 'wget', 'fetch', 'httpie', 'lwp-request', 'python-requests']
-    return not any([x in user_agent for x in plaintext_clients])
+    return all([x not in user_agent for x in plaintext_clients])
 
 @app.route('/files/<path:path>')
 def send_static(path):