diff --git a/requirements.txt b/requirements.txt
index d4f7d11..8d00faf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,3 +8,4 @@ coverage
 awscli
 flake8
 python-dotenv>=0.5.1
+pygments>=2.7.4 # not directly required, pinned by Snyk to avoid a vulnerability