diff --git a/requirements.txt b/requirements.txt
index 8c1505e..7c8559a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ download_link_replacer == 1.0.4
 teachbooks-sphinx-grasple == 1.0.5
 sphinx-image-inverter == 1.1.2
 sphinx-exercise == 1.0.1
-sphinx-proof == 0.2.0
+sphinx-proof == 0.2.1
 sphinx-named-colors == 1.0.1
 sphinx-iframes == 1.0.5
 sphinx-prime-applets == 1.0.1