diff --git a/crates/caldav/src/calendar/resource.rs b/crates/caldav/src/calendar/resource.rs
index c3e9fea..c1a59eb 100644
--- a/crates/caldav/src/calendar/resource.rs
+++ b/crates/caldav/src/calendar/resource.rs
@@ -42,7 +42,7 @@ pub enum CalendarProp {
     SupportedCalendarData(SupportedCalendarData),
     #[xml(ns = "rustical_dav::namespace::NS_CALDAV", skip_deserializing)]
     SupportedCollationSet(SupportedCollationSet),
-    #[xml(ns = "rustical_dav::namespace::NS_DAV")]
+    #[xml(ns = "rustical_dav::namespace::NS_CALDAV")]
     MaxResourceSize(i64),
     #[xml(skip_deserializing)]
     #[xml(ns = "rustical_dav::namespace::NS_DAV")]
diff --git a/crates/caldav/src/calendar/snapshots/rustical_caldav__calendar__tests__propfind-2.snap b/crates/caldav/src/calendar/snapshots/rustical_caldav__calendar__tests__propfind-2.snap
index 4710238..ae18cd7 100644
--- a/crates/caldav/src/calendar/snapshots/rustical_caldav__calendar__tests__propfind-2.snap
+++ b/crates/caldav/src/calendar/snapshots/rustical_caldav__calendar__tests__propfind-2.snap
@@ -135,7 +135,7 @@ END:VCALENDAR
                 <supported-collation xmlns="urn:ietf:params:xml:ns:caldav">i;unicode-casemap</supported-collation>
                 <supported-collation xmlns="urn:ietf:params:xml:ns:caldav">i;octet</supported-collation>
             </supported-collation-set>
-            <max-resource-size xmlns="DAV:">10000000</max-resource-size>
+            <max-resource-size xmlns="urn:ietf:params:xml:ns:caldav">10000000</max-resource-size>
             <supported-report-set xmlns="DAV:">
                 <supported-report xmlns="DAV:">
                     <report xmlns="DAV:">
diff --git a/crates/caldav/src/calendar/snapshots/rustical_caldav__calendar__tests__propfind.snap b/crates/caldav/src/calendar/snapshots/rustical_caldav__calendar__tests__propfind.snap
index 1511f37..9b51475 100644
--- a/crates/caldav/src/calendar/snapshots/rustical_caldav__calendar__tests__propfind.snap
+++ b/crates/caldav/src/calendar/snapshots/rustical_caldav__calendar__tests__propfind.snap
@@ -16,7 +16,7 @@ expression: output
             <supported-calendar-component-set xmlns="urn:ietf:params:xml:ns:caldav"/>
             <supported-calendar-data xmlns="urn:ietf:params:xml:ns:caldav"/>
             <supported-collation-set xmlns="urn:ietf:params:xml:ns:caldav"/>
-            <max-resource-size xmlns="DAV:"/>
+            <max-resource-size xmlns="urn:ietf:params:xml:ns:caldav"/>
             <supported-report-set xmlns="DAV:"/>
             <source xmlns="http://calendarserver.org/ns/"/>
             <min-date-time xmlns="urn:ietf:params:xml:ns:caldav"/>