diff -u8pdNr exportcalendarselection/0.1.1/install.rdf exportcalendarselection/0.1.2/install.rdf
--- exportcalendarselection/0.1.1/install.rdf	2019-01-16 21:19:51.253812900 +0100
+++ exportcalendarselection/0.1.2/install.rdf	2019-07-20 23:27:22.611866400 +0200
@@ -4,31 +4,31 @@
    - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
 
 <RDF xmlns="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
      xmlns:em="http://www.mozilla.org/2004/em-rdf#">
 
   <Description about="urn:mozilla:install-manifest">
     <em:name>Export Calendar Selection</em:name>
     <em:id>excasel@nadelundhirn.de</em:id>
-    <em:version>0.1.1</em:version>
+    <em:version>0.1.2</em:version>
 
     <em:localized>
       <Description>
         <em:locale>de-DE</em:locale>
         <em:name>Export Calendar Selection</em:name>
         <em:creator>Robert Brand</em:creator>
         <em:description>Nur ausgewählte Termine oder Aufgaben anstelle ganzer Kalender exportieren. Dem Menü "Termine und Aufgaben" fügt die Erweiterung einen entsprechenden Eintrag hinzu.</em:description>
         <em:homepageURL>https://www.nadelundhirn.de/wp/tag/export-calendar-selection/</em:homepageURL>
       </Description>
     </em:localized>
     <em:description>Export selected events or tasks only instead of whole calendars. The extension adds an appropriate entry to the menu "Events and tasks".</em:description>
     <em:creator>Robert Brand</em:creator>
     <em:homepageURL>https://www.nadelundhirn.de/wp/tag/export-calendar-selection/</em:homepageURL>
-    <em:updateURL>https://www.nadelundhirn.de/krams/exten/exportcalendarselection/update.rdf</em:updateURL>
+    <em:updateURL>https://www.nadelundhirn.de/krams/exten/exportcalendarselection/updates.json</em:updateURL>
 
     <em:updateKey>MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC9ai8NkE9XnAfbpjeuGLXwidUFh2cng/g8upwFhxgnGkr0+RyE2moB/NrfjHMRoHx06XHVDSLLoNCGGXAoPICzmcoBBdpiesHRjbT2No2zTp4SGNnBgqsGP3Tfmzt1FiLGJrShevYUIujH6YmBsNmKPezL6G0DtZ1Y6FNdkZr5cwIDAQAB</em:updateKey>
 
     <!-- Thunderbird -->
     <em:targetApplication>
       <Description>
         <em:id>{3550f703-e582-4d05-9a08-453d09bdfdc6}</em:id>
         <em:minVersion>38.0a1</em:minVersion>