diff --git a/ippisite/requirements-core.txt b/ippisite/requirements-core.txt
index a5f7d89d7b28282611ac2e9838602b9e0f0f0bd4..30c14ec1b061f01004a339857638671e50029d13 100644
--- a/ippisite/requirements-core.txt
+++ b/ippisite/requirements-core.txt
@@ -35,4 +35,4 @@ boltons
 # django-biodblinks App
 git+https://gitlab.pasteur.fr/hub/django-biodblinks.git#egg=django-biodblinks==0.1
 # test
-cryptography==3.4.3
+cryptography==3.3.1