diff --git a/requirements.txt b/requirements.txt
index bad75c8..4c3db72 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,3 +9,4 @@ PyHal>=10.0.6
 ccxt>=1.17.365
 ciso8601>=2.0.1
 scikit_learn>=0.20.0
+certifi>=2023.7.22 # not directly required, pinned by Snyk to avoid a vulnerability