diff --git a/requirements.txt b/requirements.txt
index 7d9ba4d..204caf5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,4 @@
 hca-ingest
+cryptography>=3.3.2 # not directly required, pinned by Snyk to avoid a vulnerability
+pyyaml>=5.4 # not directly required, pinned by Snyk to avoid a vulnerability
+urllib3>=1.26.5 # not directly required, pinned by Snyk to avoid a vulnerability