diff --git a/src/openeo_aggregator/config.py b/src/openeo_aggregator/config.py
index 7ae8fa4c..315a978d 100644
--- a/src/openeo_aggregator/config.py
+++ b/src/openeo_aggregator/config.py
@@ -126,7 +126,7 @@ def get_config(x: Union[str, Path, AggregatorConfig, None] = None) -> Aggregator
 class AggregatorBackendConfig(OpenEoBackendConfig):
     # TODO #112 migrate everything from AggregatorConfig to this class
 
-    capabilities_backend_version = openeo_aggregator.about.__version__
-    capabilities_deploy_metadata = build_backend_deploy_metadata(
+    capabilities_backend_version: str = openeo_aggregator.about.__version__
+    capabilities_deploy_metadata: dict = build_backend_deploy_metadata(
         packages=["openeo", "openeo_driver", "openeo_aggregator"],
     )
diff --git a/tests/test_views.py b/tests/test_views.py
index 33e3b2bb..dbc2b997 100644
--- a/tests/test_views.py
+++ b/tests/test_views.py
@@ -26,6 +26,7 @@
     RegexMatcher,
 )
 
+import openeo_aggregator.about
 from openeo_aggregator.config import AggregatorConfig, get_config_dir
 from openeo_aggregator.constants import JOB_OPTION_FORCE_BACKEND
 from openeo_aggregator.metadata import (
@@ -42,6 +43,7 @@ def test_capabilities(self, api100):
         res = api100.get("/").assert_status_code(200)
         capabilities = res.json
         assert capabilities["api_version"] == "1.0.0"
+        assert capabilities["backend_version"] == openeo_aggregator.about.__version__
         endpoints = capabilities["endpoints"]
         assert {"methods": ["GET"], "path": "/collections"} in endpoints
         assert {"methods": ["GET"], "path": "/collections/{collection_id}"} in endpoints
@@ -73,6 +75,11 @@ def test_billing_plans(self, api100):
         assert "early-adopter" in plans
         assert plans["early-adopter"]["paid"] is True
 
+    def test_deploy_metadata(self, api100):
+        capabilities = api100.get("/").assert_status_code(200).json
+        assert "openeo_aggregator" in capabilities["processing:software"]
+
+
     def test_only_oidc_auth(self, api100):
         res = api100.get("/").assert_status_code(200)
         capabilities = res.json