diff --git a/program/fixtures/shows.yaml b/program/fixtures/shows.yaml
index 83e621f26eeb6158c0c3f72db5ab7476a3e3bd60..32f7587f00e7ec3b96151ebc5ebcd0cacc6e2564 100644
--- a/program/fixtures/shows.yaml
+++ b/program/fixtures/shows.yaml
@@ -9,5 +9,5 @@
     description: Unmoderiertes Musikprogramm
     short_description: Unmoderiertes Musikprogramm
     email: musikredaktion@helsinki.at
-    created: 1970-01-01 00:00:00
-    last_updated: 1970-01-01 00:00:00
\ No newline at end of file
+    created: 1970-01-01T00:00:00+01:00
+    last_updated: 1970-01-01T00:00:00+01:00
diff --git a/program/fixtures/users.yaml b/program/fixtures/users.yaml
index dff429418036ba80c087612bc10061f7cf24705c..78854f4c25fbd98375845049469c962772eb5f5d 100644
--- a/program/fixtures/users.yaml
+++ b/program/fixtures/users.yaml
@@ -8,7 +8,8 @@
     username: admin
     is_staff: 1
     is_active: 1
-    date_joined: 2018-01-01 00:00:00
+    date_joined: 2018-01-01T00:00:00+01:00
+- model: auth.user
   pk: 2
   fields:
     id: 2
@@ -18,4 +19,4 @@
     username: pm1
     is_staff: 1
     is_active: 1
-    date_joined: 2018-01-01 00:00:00
\ No newline at end of file
+    date_joined: 2018-01-01T00:00:00+01:00