diff --git a/requirements.txt b/requirements.txt
index 57ebed5..7e7207a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ pytest==3.1.2
 python-redmine==2.0.2
 PyYAML==3.12
 requests==2.18.1
-urllib3==1.21.1
+urllib3==1.26.5
 xmltodict==0.11.0
 jsonschema==2.6.0
 pytz==2017.2