1 files changed, 1 insertions, 1 deletions
diff --git a/gitlab.py b/gitlab.py
index 9313c1d..b5d088c 100644
--- a/gitlab.py
+++ b/gitlab.py
@@ -871,7 +871,7 @@ class ProjectMilestone(GitlabObject):
     requiredListAttrs = ['project_id']
     requiredGetAttrs = ['project_id']
     requiredCreateAttrs = ['project_id', 'title']
-    optionalCreateAttrs = ['description', 'due_date']
+    optionalCreateAttrs = ['description', 'due_date', 'state_event']
     shortPrintAttr = 'title'