diff --git a/ckan/ckan/defaults/main.yml b/ckan/ckan/defaults/main.yml
index 80cfee7..0102481 100644
--- a/ckan/ckan/defaults/main.yml
+++ b/ckan/ckan/defaults/main.yml
@@ -97,6 +97,10 @@ ckan_pip_dependencies:
   - rdflib
   - 'urllib3[secure]'
   - bleach
+  - pyOpenSSL
+  - cryptography
+  - idna
+  - certifi
 
 ckan_pip_versioned_dependencies:
   - { name: 'SQLAlchemy', version: '0.9.6', state: 'present' }