diff --git a/server/core/hep_client.py b/server/core/hep_client.py
index 1cea8dd8..f4bbc60d 100644
--- a/server/core/hep_client.py
+++ b/server/core/hep_client.py
@@ -21,8 +21,8 @@ STUDENT_EDITION_DURATION = 4*365
 TEACHER_KEY = 'teacher'
 STUDENT_KEY = 'student'
 
-MYSKILLBOX_TEACHER_EDITION_ISBN = "978-3-0355-1450-6"
-MYSKILLBOX_STUDENT_EDITION_ISBN = "000-4-5678-9012-3"
+MYSKILLBOX_TEACHER_EDITION_ISBN = "978-3-0355-1823-8"
+MYSKILLBOX_STUDENT_EDITION_ISBN = "978-3-0355-1397-4"
 
 
 class HepClientException(Exception):