diff --git a/dev-requirements.txt b/dev-requirements.txt
index d86bead..a5ea522 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -40,5 +40,5 @@ simplegeneric==0.8.1
 simplejson==3.8.1
 six==1.10.0
 traitlets==4.0.0
-urllib3==1.24.2
+urllib3==1.26.5
 wheel==0.26.0
diff --git a/requirements.txt b/requirements.txt
index d86bead..a5ea522 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,5 +40,5 @@ simplegeneric==0.8.1
 simplejson==3.8.1
 six==1.10.0
 traitlets==4.0.0
-urllib3==1.24.2
+urllib3==1.26.5
 wheel==0.26.0