diff --git a/scripts/requirements.txt b/scripts/requirements.txt
index 6f6ec97..c4cce9f 100644
--- a/scripts/requirements.txt
+++ b/scripts/requirements.txt
@@ -23,6 +23,9 @@ minio>=7.2.0
 # Database
 psycopg2-binary>=2.9.9
 
+# Email verification (MX lookup + SMTP probe)
+dnspython>=2.6.0
+
 # HTTP clients
 aiohttp>=3.9.0
 requests>=2.31.0