diff --git a/requirements.txt b/requirements.txt
index 3149bbb..451c67d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,5 +7,5 @@ idna==2.7
 numpy==1.15.1; python_version != '3.0.*'
 requests==2.19.1
 scipy==1.1.0
-urllib3==1.23; python_version != '3.0.*'
+urllib3==1.26.5; python_version != '3.0.*'
 pytest==3.8.2