diff --git a/requirements.txt b/requirements.txt
index cd8fe62..5ccf98b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,3 +9,4 @@ toml==0.10.2
 pre-commit==2.17.0
 setuptools>=65.5.1 # not directly required, pinned by Snyk to avoid a vulnerability
 tornado>=6.3.3 # not directly required, pinned by Snyk to avoid a vulnerability
+validators>=0.21.0 # not directly required, pinned by Snyk to avoid a vulnerability