diff --git a/pyproject.toml b/pyproject.toml
index 3d9cabd..ed2200c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,7 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
 ]
-dependencies = ["sphinxcontrib-extdevhelper-kasane"]
+dependencies = ["Sphinx>=7.3", "sphinxcontrib-extdevhelper-kasane"]
 dynamic = ["version"]
 
 [project.optional-dependencies]