diff --git a/architectures/chainer/requirements.txt b/architectures/chainer/requirements.txt
index 7ee15c2..ad3d379 100644
--- a/architectures/chainer/requirements.txt
+++ b/architectures/chainer/requirements.txt
@@ -15,4 +15,4 @@ pyglet==1.2.4
 PyOpenGL==3.1.0
 requests==2.18.1
 six==1.10.0
-urllib3==1.21.1
+urllib3==1.26.5