diff --git a/requirements.txt b/requirements.txt
index 577692b..4981e1c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,6 +30,7 @@ requests==2.31.0
 soupsieve==2.4
 stem==1.8.1
 urllib3==1.26.14
+validators==0.22.0
 waitress==2.1.2
 wcwidth==0.2.6
 Werkzeug==2.3.3