diff --git a/requirements.txt b/requirements.txt
index bfb22cf..200f9eb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,3 +11,4 @@ google-cloud-vision
 vertexai
 werkzeug
 
+pyasn1>=0.6.2 # not directly required, pinned by Snyk to avoid a vulnerability