diff --git a/feed.go b/feed.go
index b911e27..956a750 100644
--- a/feed.go
+++ b/feed.go
@@ -48,6 +48,8 @@ func (f *Feed) AddAuthor(p *Person) {
 	} else {
 		f.Authors = append(f.Authors, p)
 	}
+
+	f.Updated.DateTime = DateTime(time.Now())
 }
 
 // AddCategory adds the category to the feed.
@@ -58,6 +60,8 @@ func (f *Feed) AddCategory(c *Category) {
 	} else {
 		f.Categories = append(f.Categories, c)
 	}
+
+	f.Updated.DateTime = DateTime(time.Now())
 }
 
 // AddContributor adds the contributor to the feed.
@@ -68,6 +72,8 @@ func (f *Feed) AddContributor(c *Person) {
 	} else {
 		f.Contributors = append(f.Contributors, c)
 	}
+
+	f.Updated.DateTime = DateTime(time.Now())
 }
 
 // AddLink adds the link to the feed.
@@ -79,6 +85,8 @@ func (f *Feed) AddLink(l *Link) {
 	} else {
 		f.Links = append(f.Links, l)
 	}
+
+	f.Updated.DateTime = DateTime(time.Now())
 }
 
 // AddExtension adds the extension to the feed.
@@ -89,6 +97,8 @@ func (f *Feed) AddExtension(e *ExtensionElement) {
 	} else {
 		f.Extensions = append(f.Extensions, e)
 	}
+
+	f.Updated.DateTime = DateTime(time.Now())
 }
 
 // AddEntry adds the entry to the feed.
@@ -99,6 +109,8 @@ func (f *Feed) AddEntry(e *Entry) {
 	} else {
 		f.Entries = append(f.Entries, e)
 	}
+
+	f.Updated.DateTime = DateTime(time.Now())
 }
 
 // Check checks the feed for incompatibilities with RFC4287.