diff --git a/requirements_dev.txt b/requirements_dev.txt
index 68cd0bd..7bc61bc 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -21,6 +21,6 @@ six==1.15.0
 toml==0.10.1
 tqdm==4.51.0
 twine==3.2.0
-urllib3==1.25.11
+urllib3==1.26.5
 webencodings==0.5.1
 wheel