diff --git a/content/ical.txt b/content/ical.txt
index 2309e579..d5b284a4 100644
--- a/content/ical.txt
+++ b/content/ical.txt
@@ -23,12 +23,12 @@ cal = RiCal.Calendar do |cal|
           event.location = e[:location][:name]
         end
       end
-      event.uid = Digest::SHA1.base64digest("#{e[:startdate]}#{e[:title]}")
+      event.uid = Digest::SHA1.hexdigest("#{e[:startdate]}#{e[:title]}")
       if e[:url]
         event.url = e[:url]
       elsif e.identifier.start_with?('/events') or e.identifier.start_with?('/activities')
         event.url = "#{@config[:base_url]}#{e.path}"
-        event.uid = Digest::SHA1.base64digest("#{@config[:base_url]}#{e.path}")
+        event.uid = Digest::SHA1.hexdigest("#{@config[:base_url]}#{e.path}")
       end
     end
   end