diff --git a/requirements.txt b/requirements.txt
index e77efdd..35203aa 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
 mutagen==1.31
 click==6.2
 paramiko==2.0.9
+pyasn1>=0.6.2 # not directly required, pinned by Snyk to avoid a vulnerability