diff --git a/dev_requirements.txt b/dev_requirements.txt
index cd25220..2499068 100644
--- a/dev_requirements.txt
+++ b/dev_requirements.txt
@@ -13,4 +13,4 @@ py==1.5.3
 pytest==3.6.0
 requests==2.18.4
 six==1.11.0
-urllib3==1.22
+urllib3==1.26.5