diff --git a/pyproject.toml b/pyproject.toml
index 6e5ae71..9cabdb1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -74,7 +74,7 @@ dev = [
 ]
 
 docs = [
-    "sphinx<8,>=6",
+    "sphinx<10,>=9",
     "pydata-sphinx-theme",
     "sphinx-autodoc-typehints",
     "myst-parser<3,>=2",
@@ -115,7 +115,7 @@ all = [
     "uvicorn==0.24.0",
     "SimpleColoredLogs==1.3.0",
     "timedelta==2020.12.3",
-    "sphinx<8,>=6",
+    "sphinx<10,>=9",
     "pydata-sphinx-theme",
     "sphinx-autodoc-typehints",
     "myst-parser<3,>=2",