diff --git a/app.py b/app.py
index 62da552..4813cd0 100644
--- a/app.py
+++ b/app.py
@@ -40,8 +40,9 @@ def hello():
     for k, v in cal.items():
         other.add(k, v)
 
-    # Copy the VTIMEZONE component
-    other.add_component(cal.walk('VTIMEZONE')[0])
+    # Copy VTIMEZONE components
+    for ev in cal.walk('VTIMEZONE'):
+        other.add_component(ev)
 
     # Filter and copy VEVENTs
     for ev in cal.walk('VEVENT'):