diff --git a/requirements.txt b/requirements.txt
index e5ad65f..341dcb0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,16 +3,21 @@ connexion[swagger-ui]==2.2.0
 google-auth==1.7.1
 google-cloud-storage==1.9.0
 flask>=1.0.0
-gunicorn==20.0.4
-gevent==1.4.0
-requests==2.20.0
+gunicorn==22.0.0
+gevent==23.9.0
+requests==2.32.2
 requests-mock==1.5.0
 oauth2client==4.1.2
 mock==2.0.0
 requests-http-signature==v0.0.3
 cromwell-tools>=1.1.1, <2
-black==19.3b0
+black==24.3.0
 flake8==3.7.7
 pre-commit==1.14.4
 google-cloud-pubsub==1.0.2
 git+git://github.com/HumanCellAtlas/pipeline-tools@v0.58.1
+idna>=3.7 # not directly required, pinned by Snyk to avoid a vulnerability
+setuptools>=70.0.0 # not directly required, pinned by Snyk to avoid a vulnerability
+urllib3>=1.26.19 # not directly required, pinned by Snyk to avoid a vulnerability
+werkzeug>=3.0.3 # not directly required, pinned by Snyk to avoid a vulnerability
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability