diff --git a/taskcluster/requirements.txt b/taskcluster/requirements.txt
index d213152947..15ca24c437 100644
--- a/taskcluster/requirements.txt
+++ b/taskcluster/requirements.txt
@@ -483,9 +483,9 @@ taskcluster-urls==13.0.1 \
     # via
     #   taskcluster
     #   taskcluster-taskgraph
-urllib3==1.26.17 \
-    --hash=sha256:24d6a242c28d29af46c3fae832c36db3bbebcc533dd1bb549172cd739c82df21 \
-    --hash=sha256:94a757d178c9be92ef5539b8840d48dc9cf1b2709c9d6b588232a055c524458b
+urllib3==1.26.18 \
+    --hash=sha256:34b97092d7e0a3a8cf7cd10e386f401b3737364026c45e622aa02903dffe0f07 \
+    --hash=sha256:f8ecc1bba5667413457c529ab955bf8c67b45db799d159066261719e328580a0
     # via requests
 voluptuous==0.13.1 \
     --hash=sha256:4b838b185f5951f2d6e8752b68fcf18bd7a9c26ded8f143f92d6d28f3921a3e6 \