diff --git a/fdmlpy/requirements.txt b/fdmlpy/requirements.txt
index e0d83fc..bd611fa 100644
--- a/fdmlpy/requirements.txt
+++ b/fdmlpy/requirements.txt
@@ -1,3 +1,3 @@
 build~=1.2.2
-sphinx~=7.4.7
+sphinx~=8.1.3
 sphinx_rtd_theme~=3.0.1