diff --git a/docs/requirements.txt b/docs/requirements.txt
index abde14fc8d..0c43e4acbc 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -3,3 +3,4 @@
 Sphinx==4.2.0
 urllib3.future>=2.0.934
 wassima>=1,<2
+kiss_headers>=2,<4