diff --git a/crates/ical/src/timestamp.rs b/crates/ical/src/timestamp.rs
index f23a57b..e2d9f4d 100644
--- a/crates/ical/src/timestamp.rs
+++ b/crates/ical/src/timestamp.rs
@@ -208,7 +208,7 @@ impl CalDateTime {
         matches!(&self, Self::Date(_, _))
     }
 
-    pub fn as_datetime(&self) -> Cow<DateTime<CalTimezone>> {
+    pub fn as_datetime(&self) -> Cow<'_, DateTime<CalTimezone>> {
         match self {
             Self::DateTime(datetime) => Cow::Borrowed(datetime),
             Self::Date(date, tz) => Cow::Owned(