diff --git a/common/parse-body.js b/common/parse-body.js
index 5996bf8..d9ce380 100644
--- a/common/parse-body.js
+++ b/common/parse-body.js
@@ -1,4 +1,3 @@
-const ical = require('node-ical');
 const raw = require('raw-body');
 const { DOMParser } = require('@xmldom/xmldom');
 
@@ -10,7 +9,5 @@ module.exports = async function (ctx) {
 
   if (ctx.request.type.includes('xml')) {
     ctx.request.xml = new DOMParser().parseFromString(ctx.request.body);
-  } else if (ctx.request.type === 'text/calendar') {
-    ctx.request.ical = await ical.async.parseICS(ctx.request.body);
   }
 };
diff --git a/common/tags.js b/common/tags.js
index 6db14a5..b986b68 100644
--- a/common/tags.js
+++ b/common/tags.js
@@ -83,10 +83,10 @@ module.exports = function (options) {
       },
       getetag: {
         doc: 'https://tools.ietf.org/html/rfc4791#section-5.3.4',
-        async resp({ resource, event }) {
+        async resp({ resource, ctx, event }) {
           if (resource === 'event') {
             return {
-              [buildTag(dav, 'getetag')]: options.data.getETag(event)
+              [buildTag(dav, 'getetag')]: options.data.getETag(ctx, event)
             };
           }
         }
@@ -199,8 +199,8 @@ module.exports = function (options) {
     [cal]: {
       'calendar-data': {
         doc: 'https://tools.ietf.org/html/rfc4791#section-9.6',
-        async resp({ event, calendar }) {
-          const ics = await options.data.buildICS(event, calendar);
+        async resp({ event, ctx, calendar }) {
+          const ics = await options.data.buildICS(ctx, event, calendar);
           return {
             [buildTag(cal, 'calendar-data')]: ics
           };
diff --git a/index.js b/index.js
index a5be095..7bd846a 100644
--- a/index.js
+++ b/index.js
@@ -85,7 +85,7 @@ module.exports = function (options) {
       return false;
     }
 
-    ctx.state.user = await options.authenticate({
+    ctx.state.user = await options.authenticate(ctx, {
       username: creds.name,
       password: creds.pass,
       principalId: ctx.state.params.principalId
diff --git a/package.json b/package.json
index fe879dc..e98119e 100644
--- a/package.json
+++ b/package.json
@@ -10,9 +10,9 @@
   "dependencies": {
     "@xmldom/xmldom": "^0.8.10",
     "basic-auth": "^2.0.1",
+    "boolean": "3.2.0",
     "lodash": "^4.17.21",
     "moment": "^2.30.1",
-    "node-ical": "^0.17.1",
     "path-to-regexp": "^6.2.1",
     "raw-body": "^2.5.2",
     "winston": "^3.11.0",
diff --git a/routes/calendar/calendar.js b/routes/calendar/calendar.js
index e49bbee..1520b86 100644
--- a/routes/calendar/calendar.js
+++ b/routes/calendar/calendar.js
@@ -32,7 +32,7 @@ module.exports = function (options) {
 
     if (calendarId) {
       // Check calendar exists & user has access
-      const calendar = await options.data.getCalendar({
+      const calendar = await options.data.getCalendar(ctx, {
         principalId: ctx.state.params.principalId,
         calendarId,
         user: ctx.state.user
diff --git a/routes/calendar/calendar/calendar-multiget.js b/routes/calendar/calendar/calendar-multiget.js
index 722b82b..880be52 100644
--- a/routes/calendar/calendar/calendar-multiget.js
+++ b/routes/calendar/calendar/calendar-multiget.js
@@ -19,7 +19,7 @@ module.exports = function (options) {
 
       const hrefParts = href.split('/');
       const eventId = hrefParts.at(-1).slice(0, -4);
-      const event = await options.data.getEvent({
+      const event = await options.data.getEvent(ctx, {
         eventId,
         principalId: ctx.state.params.principalId,
         calendarId: ctx.state.params.calendarId,
@@ -31,10 +31,10 @@ module.exports = function (options) {
         return response(href, status[404]);
       }
 
-      const ics = await options.data.buildICS(event, calendar);
+      const ics = await options.data.buildICS(ctx, event, calendar);
       return response(href, status[200], [
         {
-          'D:getetag': options.data.getETag(event)
+          'D:getetag': options.data.getETag(ctx, event)
         },
         {
           'CAL:calendar-data': ics
diff --git a/routes/calendar/calendar/calendar-query.js b/routes/calendar/calendar/calendar-query.js
index 3a44c94..7f1513e 100644
--- a/routes/calendar/calendar/calendar-query.js
+++ b/routes/calendar/calendar/calendar-query.js
@@ -21,9 +21,9 @@ module.exports = function (options) {
     });
 
     if (!filters?.[0]) {
-      const events = await options.data.getEventsForCalendar({
+      const events = await options.data.getEventsForCalendar(ctx, {
         principalId: ctx.state.params.principalId,
-        calendarId: options.data.getCalendarId(calendar),
+        calendarId: options.data.getCalendarId(ctx, calendar),
         user: ctx.state.user,
         fullData
       });
@@ -67,9 +67,9 @@ module.exports = function (options) {
     if (endAttr && endAttr.nodeValue && moment(endAttr.nodeValue).isValid())
       end = moment(endAttr.nodeValue).toDate();
 
-    const events = await options.data.getEventsByDate({
+    const events = await options.data.getEventsByDate(ctx, {
       principalId: ctx.state.params.principalId,
-      calendarId: options.data.getCalendarId(calendar),
+      calendarId: options.data.getCalendarId(ctx, calendar),
       start,
       end,
       user: ctx.state.user,
diff --git a/routes/calendar/calendar/delete.js b/routes/calendar/calendar/delete.js
index 9b8dda4..d451da2 100644
--- a/routes/calendar/calendar/delete.js
+++ b/routes/calendar/calendar/delete.js
@@ -17,7 +17,7 @@ module.exports = function (options) {
       return;
     }
 
-    const existing = await options.data.getEvent({
+    const existing = await options.data.getEvent(ctx, {
       eventId: ctx.state.params.eventId,
       principalId: ctx.state.params.principalId,
       calendarId: ctx.state.params.calendarId,
@@ -26,7 +26,7 @@ module.exports = function (options) {
     });
     log.debug(`existing event${existing ? '' : ' not'} found`);
 
-    await options.data.deleteEvent({
+    await options.data.deleteEvent(ctx, {
       eventId: ctx.state.params.eventId,
       principalId: ctx.state.params.principalId,
       calendarId: ctx.state.params.calendarId,
diff --git a/routes/calendar/calendar/get.js b/routes/calendar/calendar/get.js
index 35fc497..8c9ffd8 100644
--- a/routes/calendar/calendar/get.js
+++ b/routes/calendar/calendar/get.js
@@ -5,7 +5,7 @@ module.exports = function (options) {
   const log = winston({ ...options, label: 'calendar/get' });
 
   const exec = async function (ctx, calendar) {
-    const event = await options.data.getEvent({
+    const event = await options.data.getEvent(ctx, {
       eventId: ctx.state.params.eventId,
       principalId: ctx.state.params.principalId,
       calendarId: ctx.state.params.calendarId,
@@ -18,7 +18,7 @@ module.exports = function (options) {
       return;
     }
 
-    return options.data.buildICS(event, calendar);
+    return options.data.buildICS(ctx, event, calendar);
   };
 
   return {
diff --git a/routes/calendar/calendar/propfind.js b/routes/calendar/calendar/propfind.js
index 8dc9337..b758684 100644
--- a/routes/calendar/calendar/propfind.js
+++ b/routes/calendar/calendar/propfind.js
@@ -31,7 +31,7 @@ module.exports = function (options) {
 
     const calendarUrl = path.join(
       ctx.state.calendarHomeUrl,
-      options.data.getCalendarId(calendar),
+      options.data.getCalendarId(ctx, calendar),
       '/'
     );
     const props = _.compact(res);
@@ -53,9 +53,9 @@ module.exports = function (options) {
     const fullData = _.some(children, (child) => {
       return child.localName === 'calendar-data';
     });
-    const events = await options.data.getEventsForCalendar({
+    const events = await options.data.getEventsForCalendar(ctx, {
       principalId: ctx.state.params.principalId,
-      calendarId: options.data.getCalendarId(calendar),
+      calendarId: options.data.getCalendarId(ctx, calendar),
       user: ctx.state.user,
       fullData
     });
diff --git a/routes/calendar/calendar/put.js b/routes/calendar/calendar/put.js
index e69b1a1..81b563c 100644
--- a/routes/calendar/calendar/put.js
+++ b/routes/calendar/calendar/put.js
@@ -1,4 +1,3 @@
-const _ = require('lodash');
 const { notFound, preconditionFail } = require('../../../common/x-build');
 const { setMissingMethod } = require('../../../common/response');
 const winston = require('../../../common/winston');
@@ -19,14 +18,16 @@ module.exports = function (options) {
       return;
     }
 
-    const incoming = _.find(ctx.request.ical, { type: 'VEVENT' });
-    if (!incoming) {
+    if (
+      ctx.request.type !== 'text/calendar' ||
+      typeof ctx.request.body !== 'string'
+    ) {
       log.warn('incoming VEVENT not present');
       ctx.body = notFound(ctx.url); // Make more meaningful
       return;
     }
 
-    const existing = await options.data.getEvent({
+    const existing = await options.data.getEvent(ctx, {
       eventId: ctx.state.params.eventId,
       principalId: ctx.state.params.principalId,
       calendarId: ctx.state.params.calendarId,
@@ -43,30 +44,28 @@ module.exports = function (options) {
         return;
       }
 
-      const updateObject = await options.data.updateEvent({
+      const updateObject = await options.data.updateEvent(ctx, {
         eventId: ctx.state.params.eventId,
         principalId: ctx.state.params.principalId,
         calendarId: ctx.state.params.calendarId,
-        event: incoming,
         user: ctx.state.user
       });
       log.debug('event updated');
 
       /* https://tools.ietf.org/html/rfc4791#section-5.3.2 */
       ctx.status = 201;
-      ctx.set('ETag', options.data.getETag(updateObject));
+      ctx.set('ETag', options.data.getETag(ctx, updateObject));
     } else {
-      const newObject = await options.data.createEvent({
+      const newObject = await options.data.createEvent(ctx, {
         eventId: ctx.state.params.eventId,
         principalId: ctx.state.params.principalId,
         calendarId: ctx.state.params.calendarId,
-        event: incoming,
         user: ctx.state.user
       });
       log.debug('new event created');
       /* https://tools.ietf.org/html/rfc4791#section-5.3.2 */
       ctx.status = 201;
-      ctx.set('ETag', options.data.getETag(newObject));
+      ctx.set('ETag', options.data.getETag(ctx, newObject));
     }
   };
 
diff --git a/routes/calendar/calendar/sync-collection.js b/routes/calendar/calendar/sync-collection.js
index 1e52cab..574ddad 100644
--- a/routes/calendar/calendar/sync-collection.js
+++ b/routes/calendar/calendar/sync-collection.js
@@ -19,9 +19,9 @@ module.exports = function (options) {
     const fullData = _.some(children, (child) => {
       return child.localName === 'calendar-data';
     });
-    const events = await options.data.getEventsForCalendar({
+    const events = await options.data.getEventsForCalendar(ctx, {
       principalId: ctx.state.params.principalId,
-      calendarId: options.data.getCalendarId(calendar),
+      calendarId: options.data.getCalendarId(ctx, calendar),
       user: ctx.state.user,
       fullData
     });
diff --git a/routes/calendar/user/propfind.js b/routes/calendar/user/propfind.js
index ad31b05..f8d7964 100644
--- a/routes/calendar/user/propfind.js
+++ b/routes/calendar/user/propfind.js
@@ -36,7 +36,7 @@ module.exports = function (options) {
       response(ctx.url, props.length > 0 ? status[200] : status[404], props)
     ];
 
-    const calendars = await options.data.getCalendarsForPrincipal({
+    const calendars = await options.data.getCalendarsForPrincipal(ctx, {
       principalId: ctx.state.params.principalId,
       user: ctx.state.user
     });
diff --git a/routes/principal/mkcalendar.js b/routes/principal/mkcalendar.js
index 8fb96fd..4142702 100644
--- a/routes/principal/mkcalendar.js
+++ b/routes/principal/mkcalendar.js
@@ -62,8 +62,8 @@ module.exports = function (options) {
     //   </d:set>
     // </c:mkcalendar>
 
-    const calendarObject = await options.data.createCalendar(calendar);
+    const calendarObject = await options.data.createCalendar(ctx, calendar);
     ctx.status = 201;
-    ctx.set('ETag', options.data.getETag(calendarObject));
+    ctx.set('ETag', options.data.getETag(ctx, calendarObject));
   };
 };