diff --git a/requirements_dev.txt b/requirements_dev.txt
index f6aa435..eaaf7bf 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -29,6 +29,6 @@ snowballstemmer==1.2.1
 tqdm==4.28.1
 twine==1.12.1
 typed-ast==1.1.0
-urllib3==1.24.2
+urllib3==1.26.3
 webencodings==0.5.1
 wrapt==1.10.11