diff --git a/requirements.txt b/requirements.txt
index d8a59e2..07c494c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,5 +16,5 @@ pytz==2018.5
 requests==2.19.1
 six==1.11.0
 stix==1.2.0.6
-urllib3==1.23
+urllib3==1.24.2
 weakrefmethod==1.0.3