diff --git a/rtd_requirements.txt b/rtd_requirements.txt
index 18684b7..5e254ee 100644
--- a/rtd_requirements.txt
+++ b/rtd_requirements.txt
@@ -1,2 +1,2 @@
-django>=1.9,<1.10
+django>=3.1.1,<3.2
 six