diff --git a/docs/requirements.txt b/docs/requirements.txt
index c3d5daf..44057d2 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -17,5 +17,5 @@ sphinxcontrib-devhelp==1.0.2
 sphinxcontrib-htmlhelp==2.0.1
 sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-qthelp==1.0.3
-sphinxcontrib-serializinghtml==1.1.5
+sphinxcontrib-serializinghtml==1.1.9
 urllib3==2.0.4
\ No newline at end of file