diff --git a/requirements.txt b/requirements.txt
index 2c34a17..366dda8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -68,3 +68,4 @@ vyper
 watchdog
 web3
 wn
+pycryptodome>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability