diff --git a/requirements.txt b/requirements.txt
index 78d49f7..dc0af3b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,4 @@ dash_html_components
 Flask
 plotly
 requests
+idna>=3.15 # not directly required, pinned by Snyk to avoid a vulnerability