diff --git a/requirements.txt b/requirements.txt
index f444308..fcf82ec 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ attrs==17.2.0
 Automat==0.6.0
 billiard==3.5.0.2
 caldav==0.4.0
-celery==4.0.2
+celery==5.2.2
 cffi==1.9.1
 chardet==2.3.0
 click==6.6