diff --git a/requirements.txt b/requirements.txt
index 8e1d11b..b00c192 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,4 +2,4 @@ modoboa>=2.0.0
 django-filter==22.1
 drf-nested-routers
 django-webpack-loader==1.8.1
-caldav==1.1.1
+caldav==1.1.3