diff --git a/ckan/ckan/defaults/main.yml b/ckan/ckan/defaults/main.yml
index cc2d8a2b..8fb62c75 100644
--- a/ckan/ckan/defaults/main.yml
+++ b/ckan/ckan/defaults/main.yml
@@ -111,6 +111,8 @@ ckan_pip_dependencies:
   - idna
   - certifi
   - xmltodict
+  - ndg-httpsclient
+  - pyasn1
 
 ckan_pip_versioned_dependencies:
   - { name: 'SQLAlchemy', version: '0.9.6', state: 'present' }