diff --git a/requirements.txt b/requirements.txt
index 0be94c3..1ef56e3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,3 +2,4 @@ colorama==0.4.1
 urllib3==1.24.2
 requests==2.21.0
 beautifulsoup4==4.9.3
+idna>=3.7 # not directly required, pinned by Snyk to avoid a vulnerability