diff --git a/requirements-to-freeze.txt b/requirements-to-freeze.txt
index 12983cc..5d82fb8 100644
--- a/requirements-to-freeze.txt
+++ b/requirements-to-freeze.txt
@@ -18,3 +18,4 @@ gunicorn
 # Testing && development
 flake8
 black
+wtforms>=3.0.0a1 # not directly required, pinned by Snyk to avoid a vulnerability