diff --git a/requirements.txt b/requirements.txt
index 18b1ed3..9e05c92 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
 pymongo
 xxhash
 click
-jsondiff
\ No newline at end of file
+jsondiff
+dnspython>=2.6.1 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file