diff --git a/Pipfile b/Pipfile
index 851297a..5997d88 100644
--- a/Pipfile
+++ b/Pipfile
@@ -15,6 +15,7 @@ starlette = "*"
 uvicorn = "*"
 orjson = "*"
 pyjwt = "*"
+pyyaml = "*"
 
 [requires]
 python_version = "3"
diff --git a/setup.py b/setup.py
index ff65312..d9b1140 100755
--- a/setup.py
+++ b/setup.py
@@ -48,7 +48,8 @@ setup(
         "half_orm @ git+ssh://git@gite.lirmm.fr/maizi/halfORM.git",
         "click>=7.1,<8",
         "uvicorn>=0.11,<1",
-        "orjson>=3.1.1,<4"
+        "orjson>=3.1.1,<4",
+        "pyyaml>=5.3.1,<6"
     ],
     extras_require={
         "tests":[