diff --git a/requirements.txt b/requirements.txt
index bbf537d..1986dd9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,3 +3,6 @@
 xnat>=0.3.9
 progressbar2>=3.16.0
 future>=0.16
+certifi>=2023.7.22 # not directly required, pinned by Snyk to avoid a vulnerability
+idna>=3.7 # not directly required, pinned by Snyk to avoid a vulnerability
+requests>=2.31.0 # not directly required, pinned by Snyk to avoid a vulnerability