diff --git a/setup.py b/setup.py
index 143239f..f6e5840 100644
--- a/setup.py
+++ b/setup.py
@@ -56,7 +56,7 @@ def read(path, encoding="utf-8"):
     "pydocstyle!=4.0.0,<6.0.0",  # There is an issue with indented code blocks in 4.0.0
 ]
 docs_requires = [
-    "sphinx>=2.1.2,<2.4.0",
+    "sphinx>=2.1.2,<3.1.0",
     "sphinx_rtd_theme==0.4.3",
     "sphinx_autodoc_typehints==1.10.3",
 ]