diff --git a/requirements-shared.txt b/requirements-shared.txt
index 91bfdcc..289de29 100644
--- a/requirements-shared.txt
+++ b/requirements-shared.txt
@@ -2,6 +2,7 @@ requests==2.3.0
 tornado==4.0
 chardet
 html5lib
-ox
+ox>=3
+ox.web>=3
 python-stdnum==0.9
 PyPDF2==1.23
diff --git a/requirements.txt b/requirements.txt
index fad5ebc..97cd08e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 lxml
 simplejson
-ed25519
+ed25519>=1.3
 SQLAlchemy==0.9.7
 pyopenssl>=0.14
 pillow