diff --git a/api/src/main/resources/api.yaml b/api/src/main/resources/api.yaml
index 0c220e54f58d563f68edbfa5edc0e119d4061f35..7942511608c2dc25acf57b7b9ed176762acd513a 100644
--- a/api/src/main/resources/api.yaml
+++ b/api/src/main/resources/api.yaml
@@ -6,10 +6,10 @@ info:
   contact:
     name: IndiScale GmbH
     email: t.fitschen@indiscale.com
-    url: https://www.indiscale.com
+    url: "https://www.indiscale.com"
 
 servers:
-  - url: http://localhost:8080
+  - url: "http://localhost:8080"
 
 tags:
   - name: Repositories