diff --git a/requirements_test.txt b/requirements_test.txt
index 8325f6c..f6825e0 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -11,3 +11,6 @@ pytest
 pytest-cov
 pytest-runner
 readme_renderer
+certifi>=2023.7.22 # not directly required, pinned by Snyk to avoid a vulnerability
+pygments>=2.15.0 # not directly required, pinned by Snyk to avoid a vulnerability
+requests>=2.31.0 # not directly required, pinned by Snyk to avoid a vulnerability