diff --git a/Discovering-Subdomains/requirements.txt b/Discovering-Subdomains/requirements.txt
index 2c24336e..c1f8d565 100644
--- a/Discovering-Subdomains/requirements.txt
+++ b/Discovering-Subdomains/requirements.txt
@@ -1 +1,2 @@
 requests==2.31.0
+urllib3>=2.6.3 # not directly required, pinned by Snyk to avoid a vulnerability