diff --git a/pyproject.toml b/pyproject.toml
index 964e795e4..73c7321db 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -68,7 +68,7 @@ dev = [
     "cyclonedx-bom >=3.5.0,<4.0.0",
 ]
 docs = [
-    "sphinx >=5.3.0,<6.0.0",
+    "sphinx >=5.3.0,<7.0.0",
     "sphinx-autodoc-typehints >=1.19.4,<2.0.0",
     "sphinx-rtd-theme >=1.0.0,<2.0.0",
     "numpydoc >=1.5.0,<2.0.0",