diff --git a/docs/requirements.txt b/docs/requirements.txt
index 295d5d0..f45d7f0 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1 +1,2 @@
-m2r
\ No newline at end of file
+m2r
+mistune>=2.0.3 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file