diff --git a/requirements.txt b/requirements.txt
index 98b77a0e..10dc5102 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,4 +21,5 @@ six==1.15.0
 webdavclient3==3.14.4
 whitenoise==5.1.0
 icalendar==4.0.6
-pyyaml==5.3.1
\ No newline at end of file
+pyyaml==5.3.1
+uritemplate==3.0.1
\ No newline at end of file