diff --git a/tox.ini b/tox.ini
index d812ee48..0b2e7380 100644
--- a/tox.ini
+++ b/tox.ini
@@ -43,7 +43,7 @@ deps=
 	django41: Django ~= 4.1
 	django42: Django ~= 4.2
 	django50: Django ~= 5.0
-	django51: Django ~= 5.1b1
+	django51: Django ~= 5.1rc1
 
     linkcheck,apicheck: -r{toxinidir}/requirements/docs.txt
     flake8,pydocstyle: -r{toxinidir}/requirements/pkgutils.txt