diff --git a/environment.yml b/environment.yml
index 3ef2c7d..47fe81d 100644
--- a/environment.yml
+++ b/environment.yml
@@ -13,6 +13,7 @@ dependencies:
 - cachetools
 - DateTimeRange
 - fastapi>=0.109.0
+- jsonschema
 - pip
 - pydantic>2
 - pydantic-settings>2
diff --git a/pyproject.toml b/pyproject.toml
index 62d64ad..4240c4d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,6 +20,7 @@ dependencies = [
   "cads-catalogue@git+https://github.com/ecmwf-projects/cads-catalogue.git",
   "cads-common@git+https://github.com/ecmwf-projects/cads-common.git",
   "fastapi",
+  "jsonschema",
   "ogc-api-processes-fastapi@git+https://github.com/ecmwf-projects/ogc-api-processes-fastapi.git",
   "pydantic>2",
   "pydantic-settings>2",