diff --git a/requirements.txt b/requirements.txt
index 9a3fce0..b54663e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,4 @@ pandas
 xlrd
 matplotlib
 codeclimate-test-reporter
+numpy>=1.22.2 # not directly required, pinned by Snyk to avoid a vulnerability