try this?

diff --git a/requirements.txt b/requirements.txt
index 92ab148acba560f9303da8bed3832a2c48ecc618..ef1d74231bbb22b114dd298d9d96456c261fccda 100644 (file)
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ git+https://github.com/btbonval/django-filepicker.git
 filemagic==1.6
 requests
 beautifulsoup4
-cryptography # here to make buildpack install libffi
+cffi # here to make buildpack install libffi
 pyopenssl
 python-twitter
 gdshortener