diff --git a/Dockerfile b/Dockerfile
index 678eac2..299272f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,5 +13,5 @@ ENV PASSWORD=""
 ENV RA_API=""
 ENV RA_USER=""
 
-
+ENTRYPOINT ["sh", "-c"]
 CMD python3 ./app.py "${CALDAV_URL}" "${CALENDAR_NAME}" "${USERNAME}" "${PASSWORD}" "${RA_API}" "${RA_USER}"