diff --git a/content/activities/201702-cryptoparty.md b/content/activities/201702-cryptoparty.md
index d25ffa05..4465ce35 100644
--- a/content/activities/201702-cryptoparty.md
+++ b/content/activities/201702-cryptoparty.md
@@ -1,7 +1,7 @@
 ---
 kind: event
-startdate: 2017-02-11T13:00:00Z
-duration: 5h
+startdate: 2017-02-11T15:00:00Z
+duration: 4h
 title: "Cryptoparty in der Stadtbibliothek"
 location:
   location: bib