diff --git a/dev-requirements.txt b/dev-requirements.txt
index 8bd490b..e407088 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -189,7 +189,7 @@ typing-extensions==3.7.4.3
     # via
     #   black
     #   mypy
-urllib3==1.26.3
+urllib3==1.26.4
     # via requests
 virtualenv==20.4.0
     # via
diff --git a/requirements.txt b/requirements.txt
index 8698ffb..2d8909e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -98,7 +98,7 @@ six==1.15.0
     #   python-dateutil
 thesmuggler==1.0.1
     # via -r requirements.in
-urllib3==1.26.3
+urllib3==1.26.4
     # via requests
 werkzeug==1.0.1
     # via flask