diff --git a/backend/capellacollab/config/config_schema.yaml b/backend/capellacollab/config/config_schema.yaml
index abf219e1a7..f13087bedf 100644
--- a/backend/capellacollab/config/config_schema.yaml
+++ b/backend/capellacollab/config/config_schema.yaml
@@ -111,7 +111,7 @@ properties:
       host:
         type: string
       port:
-        type: string
+        type: ["number", "string"]
       scheme:
         type: string
       metadata: