diff --git a/requirements_dev.txt b/requirements_dev.txt
index a1cee13..c472908 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -25,5 +25,5 @@ scipy==1.1.0
 six==1.11.0
 tqdm==4.28.0
 twine==1.12.1
-urllib3==1.24
+urllib3==1.26.5
 webencodings==0.5.1