diff --git a/requirements.txt b/requirements.txt
index 0f24296d2da78f0da0e67aa7bd3a0abf6882928a..efcaf8b8ecab82fc7728dadff823bb8bb592251f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -37,3 +37,4 @@ sphinxcontrib-youtube==1.4.1
 tornado==6.4
 urllib3==2.1.0
 pyyaml>=3.13
+sphinxext-rediraffe>=0.2.7