diff --git a/dev-requirements.txt b/dev-requirements.txt
index b40f5ab..660207e 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -26,5 +26,5 @@ toml==0.9.6
 tqdm==4.26.0
 twine==1.12.1
 typed-ast==1.1.0
-urllib3==1.23
+urllib3==1.26.5
 webencodings==0.5.1