diff --git a/requirements.txt b/requirements.txt
index d73fc8f..12ff7da 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,4 +2,4 @@ python-dateutil>=2.7.*
 inflection>=0.3.*
 unidecode>=1.0.*
 Jinja2>=2.10.*
-ordered-set==3.*
\ No newline at end of file
+ordered-set==4.*
\ No newline at end of file