diff --git a/dev-requirements.txt b/dev-requirements.txt
index d5c329597..99b7da5b4 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -5,4 +5,4 @@ pytest
 pytest-cov
 
 # Only for building documentation
-Sphinx>=1.8,<1.9
+Sphinx>=1.8,<8.1