diff --git a/requirements.txt b/requirements.txt
index 6a9076b..983ac80 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
 celery-types>=0.20.0
+connexion>=2.11.2,<3
 foca>=0.12.1
 geopy>=2.2.0
 gunicorn>=20.1.0,<21