diff --git a/requirements.txt b/requirements.txt
index 79fe006..a7618bc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,9 +5,9 @@ Flask==1.0
 Flask-Limiter==0.9.3
 flask-restplus==0.9.2
 functools32==3.2.3.post2
-gunicorn==19.6.0
+gunicorn==19.10.0
 itsdangerous==0.24
-Jinja2==2.9.4
+Jinja2==2.11.3
 jsonschema==2.5.1
 limits==1.2.1
 MarkupSafe==0.23
@@ -19,3 +19,4 @@ pytz==2016.10
 requests==2.20.0
 six==1.10.0
 Werkzeug==0.15.3
+urllib3>=1.26.5 # not directly required, pinned by Snyk to avoid a vulnerability