diff --git a/requirements.txt b/requirements.txt
index d59bd4a..6a8701a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,4 +19,5 @@ google_api_python_client>=1.7.4
 scikit_learn>=0.20.0
 oauth2client>=4.1.3
 lxml
-pandas
\ No newline at end of file
+pandas
+dnspython>=2.6.0rc1 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file